301 ► California, Kern County, Ridgecrest — Naval Ordnance Test Station, China Lake — AIAA Historic Aerospace Site —

On Las Flores Avenue east of China Lake Boulevard, on the left when traveling east.

302 ► California, Kern County, Tehachapi — 9 — Tehachapi Hospital

On E Street west of Green Street, on the right when traveling west. Reported missing.

303 ► California, Lake County, Upper Lake — Drug and Prescription Store —

On Main Street near Washington Street, on the left when traveling north.

304 ► California, Los Angeles County, Angeles National Forest — Benjamin Davis Wilson — Don Benito —

Near Mount Wilson Road.

305 ► California, Los Angeles County, Angeles National Forest — Harvard’s Mount Wilson Station —

On Mt. Wilson Road, on the right when traveling south.

306 ► California, Los Angeles County, Angeles National Forest — Michelson Pier on Mount Wilson —

Near Mount Wilson Road.

307 ► California, Los Angeles County, Angeles National Forest — The 100-Inch Hooker Telescope — Mount Wilson Observatory —

Near Mt Wilson Red Box Road 4.7 miles south of Angeles Crest Highway (California Route 2).

308 ► California, Los Angeles County, Angeles National Forest — The Lowe Observatory — Mount Lowe Railway —

Near Sam Merrill Trail north of Echo Mountain.

309 ► California, Los Angeles County, Angeles National Forest — The Mount Wilson 100 Inch Telescope — International Historic Mechanical Engineering Landmark — 1918 —

Near Mt Wilson Red Box Road 4.7 miles south of Angeles Crest Highway (California Route 2).

310 ► California, Los Angeles County, Carson — Robert A. Cinader —

On East 223rd Street 0.1 miles east of Wilmington Avenue, on the right when traveling west.

311 ► California, Los Angeles County, Commerce — The Tree of Remembrance — COVID-19 —

Near Commerce Way south of Harbor Street, on the right when traveling south.

312 ► California, Los Angeles County, Culver City — 5 — American Legion Building —

On Hughes Avenue south of Venice Boulevard, on the left when traveling south.

313 ► California, Los Angeles County, Culver City, Downtown — 2 — The Hull Building —

On Culver Boulevard at Washington Boulevard, on the right when traveling south on Culver Boulevard.

314 ► California, Los Angeles County, Duarte — City of Hope — History —

Near Duarte Road at Hope Drive.

315 ► California, Los Angeles County, El Monte — San Gabriel Mountains — Mount Wilson Observatory —

Near Rio Hondo Bike Path 0.4 miles west of Peck Road Water Conservation Park.

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316 ► California, Los Angeles County, La Verne — 3 — Dr. Frank Shirk Home — Craftsman Bungalow - 1910 —

On 3rd Street east of F Street, on the left when traveling east.

317 ► California, Los Angeles County, Long Beach, Washington — St. Marys Long Beach Hospital — 1937 — Public Works Administration —

On 10th Street at Linden Avenue, on the right when traveling west on 10th Street.

318 ► California, Los Angeles County, Los Angeles, Canoga Park — F-1 Engine —

On De Soto Avenue 0.2 miles south of Nordhoff St, on the left when traveling south.

319 ► California, Los Angeles County, Los Angeles, Canoga Park — Rocketdyne Santa Susana Field Laboratory — AIAA Historic Aerospace Site —

Near De Soto Avenue 0.2 miles south of Nordhoff Street, on the left when traveling south.

320 ► California, Los Angeles County, Los Angeles, Chinatown — Pacific Alliance Medical Center — The French Hospital —

On College Street west of Hill Street, on the right when traveling west.

321 ► California, Los Angeles County, Los Angeles, East Hollywood — Kaiser Permanente — Kaiser Hospital —

On Sunset Boulevard at L Ron Hubbard Way, on the right when traveling west on Sunset Boulevard.

322 ► California, Los Angeles County, Los Angeles, Echo Park — 504 — Barlow Sanitorium —

On Stadium Way 0.8 miles north of California Route 110, on the right when traveling north.

323 ► California, Los Angeles County, Los Angeles, Lake Balboa — Birmingham Army Hospital — Van Nuys, California — Birmingham High School —

Near Haynes Street 0.2 miles west of Balboa Boulevard, on the left when traveling west.

324 ► California, Los Angeles County, Los Angeles, Miracle Mile — Chester Stock Ph.D. — Observation Pit — La Brea Tar Pits —

Near Wilshire Boulevard west of South Curson Street.

325 ► California, Los Angeles County, Los Angeles, Northeast Los Angeles — General Hospital — Entrance Facade — 1933 —

On State Street 0.2 miles north of Marengo Street, on the right when traveling north.

326 ► California, Los Angeles County, Los Angeles, Northridge — Botanic Garden — California State University Northridge —

On Lindley Avenue 0.2 miles north of Nordhoff Street, on the right when traveling north.

327 ► California, Los Angeles County, Los Angeles, Northridge — Chaparral Hall — California State University Northridge —

On Lindley Avenue 0.1 miles north of Nordhoff Street, on the right when traveling north.

328 ► California, Los Angeles County, Los Angeles, San Pedro — Anna Lee Fisher - Astronaut — Los Angeles Maritime Museum —

Near Sampson Street south of East 6th Street.

329 ► California, Los Angeles County, Los Angeles, South Los Angeles — California Science Center —

On Figueroa Street at State Drive, on the right when traveling south on Figueroa Street.

330 ► California, Los Angeles County, Los Angeles, South Los Angeles — John Tracy Clinic —

On Adams Boulevard at St James Place, on the right when traveling west on Adams Boulevard.

331 ► California, Los Angeles County, Los Angeles, South Los Angeles — 606 — Kerckhoff House —

On Adams Boulevard east of Severance Street, on the right when traveling east.

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332 ► California, Los Angeles County, Los Angeles, South Los Angeles — Neil Armstrong — August 5, 1930 - August 25, 2012 —

Near Watt Way north of Bloom Walk.

333 ► California, Los Angeles County, Los Angeles, South Los Angeles — Rose Garden — Exposition Park — Established 1927 —

On Exposition Park Drive.

334 ► California, Los Angeles County, Los Angeles, South Los Angeles — Wishing on a Star, 2009 — Charles Dickson — Recycled metal and repurposed objects —

Near State Drive west of Figueroa Street, on the left when traveling west.

335 ► California, Los Angeles County, Los Angeles, Venice — Luminaries of Pantheism Mural — The Paradise Project —

On Ocean Front Walk at South Venice Boulevard, on the left when traveling south on Ocean Front Walk.

336 ► California, Los Angeles County, Los Angeles, West Los Angeles — Veterans Administration Center —

On Eisenhower Avenue just west of Bonsall Avenue, on the left when traveling west.

337 ► California, Los Angeles County, Los Angeles, Westwood — Birthplace of the Internet - 1969 — IEEE Milestone in Electrical Engineering and Computing —

Near Westwood Plaza near Portola Plaza.

338 ► California, Los Angeles County, Los Angeles, Westwood — Western Data Processing Center —

Near Charles E Young Drive East just north of Wyton Drive, on the left when traveling north.

339 ► California, Los Angeles County, Malibu, Eastern Malibu — First Working Laser — IEEE Milestone in Electrical Engineering — 1960 —

Near Malibu Canyon Road 1 mile north of Pacific Coast Highway (California Route 1), on the left when traveling north.

340 ► California, Los Angeles County, Monterey Park — Garvey Ranch House —

On Orange Avenue 0.1 miles south of Graves Avenue, on the right when traveling south.

341 ► California, Los Angeles County, Palmdale — The San Andreas Fault —

On State Highway 14 2.4 miles north of Angeles Forest Highway, on the right when traveling north.

342 ► California, Los Angeles County, Pasadena — Beckman pH Meter — National Historic Chemical Landmark - 1934 — and Polyhedron Fountain —

Near Michigan Avenue south of Del Mar Avenue.

343 ► California, Los Angeles County, Pasadena — George Ellery Hale — Carnegie Observatories —

On Santa Barbara Street 0.1 miles west of Lake Avenue, on the right when traveling west.

344 ► California, Los Angeles County, Pasadena — Hale Solar Laboratory —

Near Holladay Road south of Lombardy Road, on the left when traveling south.

345 ► California, Los Angeles County, Pasadena — Iris Garden — Alfred Henry Sturtevant —

Near California Boulevard east of Wilson Avenue.

346 ► California, Los Angeles County, Pasadena — Karman Laboratory of Fluid Dynamics and Jet Propulsion —

Near unnamed walkway north of California Boulevard.

347 ► California, Los Angeles County, Pasadena — The First Known Antiparticle — Historic Physics Site —

Near California Boulevard 0.1 miles east of Wilson Avenue.

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348 ► California, Los Angeles County, Pasadena — Throop Memorial Garden —

Near California Boulevard east of Wilson Avenue.

349 ► California, Los Angeles County, Pasadena — William Morris Davis, 1850-1930 — In Memoriam —

Near California Boulevard east of Wilson Avenue.

350 ► California, Los Angeles County, Pasadena, North Arroyo — Aerojet Engineering Corporation First Plant — AIAA Historic Aerospace Site —

On Colorado Boulevard just west of St John Avenue, on the right when traveling west.

351 ► California, Los Angeles County, Pasadena, North Arroyo — Jet Propulsion Laboratory — Founders’ Plaque —

Near Oak Grove Drive 0.3 miles north of Foothill Boulevard.

352 ► California, Los Angeles County, Pasadena, North Arroyo — Space Flight Operations Facility — Jet Propulsion Laboratory —

Near Oak Grove Drive 0.3 miles north of Foothill Boulevard.

353 ► California, Los Angeles County, Pasadena, North Arroyo — The Voyager Spacecraft - Interplanetary Explorers — International Historic Mechanical Engineering Landmark — 1977 —

Near Oak Grove Drive 0.3 miles north of Foothill Boulevard, on the right when traveling north.

354 ► California, Los Angeles County, Pasadena, North Arroyo — Twenty-Five-Foot Space Simulator — Jet Propulsion Laboratory —

Near Oak Grove Drive 0.3 miles north of Foothill Boulevard.

355 ► California, Los Angeles County, Pasadena, North Arroyo — Voyager 1 —

Near Oak Grove Drive 0.3 miles north of Foothill Boulevard.

356 ► California, Los Angeles County, Pasadena, South Arroyo — Terrace Villa Mansion / Mayfair Mansion —

On Terrace Drive 0.1 miles south of Green Street, on the right when traveling south.

357 ► California, Los Angeles County, Pearblossom — The Devil's Punchbowl — Department of Parks & Recreation, County of Los Angeles —

Near County Route N6 8 miles south of Pearblossom Highway.

358 ► California, Los Angeles County, Rosemead — Dr. Ada (Quinn) Brasher — (1871-1953) — Savannah Memorial Park —

Near Valley Boulevard east of Loma Avenue.

359 ► California, Los Angeles County, Rosemead — Dr. Thomas A. Mayes — (1825–1874) — Savannah Memorial Park —

Near Valley Boulevard east of Loma Avenue.

360 ► California, Los Angeles County, Santa Monica, Ocean Park — 8 — The Doctor is In —

On Pico Boulevard west of 4th Street, on the right when traveling west.

361 ► California, Los Angeles County, Sierra Madre — Mount Wilson Trail — Lizzie’s Trail Inn — John Richardson House —

On East Mira Monte Avenue at Mt Wilson Trail, on the left when traveling east on East Mira Monte Avenue.

362 ► California, Los Angeles County, Whittier — Fred C. Nelles —

On Harvest Drive just north of Autumn Avenue, on the right when traveling north.

363 ► California, Marin County, Tiburon — Ayala Cove —

Near North Ridge Trail.

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364 ► California, Marin County, Tiburon — Ayala Cove —

Near Angel Island.

365 ► California, Marin County, Tiburon — Caring for Soldiers —

On Perimeter Road, on the right when traveling south.

366 ► California, Marin County, Tiburon — Hospital —

Near North Ridge Road.

367 ► California, Marin County, Tiburon — Isolating Disease —

Near Angel Island.

368 ► California, Marin County, Tiburon — Medical Officers at Home —

Near Angel Island.

369 ► California, Marin County, Tiburon — Protecting the Public Health —

On Perimeter Road, on the right when traveling north.

370 ► California, Marin County, Tiburon — Registration and Screening —

Near North Ridge Trail.

371 ► California, Marin County, Tiburon — Separate Doors —

Near North Ridge Road.

372 ► California, Marin County, Tiburon — Treating the Troops — ☤ —

On Perimeter Road, on the left when traveling north.

373 ► California, Mariposa County, Yosemite National Park — The Grand Lodge —

Near Ahwahnee Drive, on the right when traveling east.

374 ► California, Mariposa County, Yosemite Valley — Glacier Point View Terrace — Yosemite National Park —

Near Glacier Point Road, on the right when traveling north.

375 ► California, Mariposa County, Yosemite Valley — Happy Isles Gaging Station —

Near John Muir Trail south of Happy Isle Loop Road, on the left when traveling south.

376 ► California, Merced County, Los Banos — Guglielmo Marconi — 1874 - 1937 —

On I Street at 6th Street, on the right when traveling west on I Street.

377 ► California, Mono County, Bridgeport — Poor Farm —

On U.S. 395 at Green Creek Road, on the right when traveling south on U.S. 395.

378 ► California, Mono County, the Inyo National Forest — The Patriarch — In Memoriam to A.E. Noren — Largest Bristlecone Pine —

Near White Mountain Road 13 miles north of Ancient Bristlecone Pine Forest Visitor Center, on the right when traveling north.

379 ► California, Monterey County, Big Sur — Condors: Returning to Our Skies —

Near Cabrillo Highway (U.S. 1 at milepost 37).

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380 ► California, Monterey County, Monterey — Ed Ricketts’s Backyard — Historic Cannery Row —

Near Cannery Row.

381 ► California, Monterey County, Monterey — Edward Ricketts — 1897-1948 —

Near Wave Street near Drake Avenue.

382 ► California, Monterey County, Monterey — John Steinbeck — Historic Cannery Row —

Near Monterey Recreational Trail at Bruce Aris Way (Irving Avenue), on the right when traveling south.

383 ► California, Monterey County, Monterey — One Man, Two Worlds — Historic Cannery Row —

On Cannery Row near Bruce Aris Way (Irving Avenue).

384 ► California, Monterey County, Monterey — Rear Admiral Alan Shepard Tree — Naval Officer Astronaut —

On University Circle at University Way, on the right on University Circle.

385 ► California, Monterey County, Monterey — Science — Historic Cannery Row —

Near Cannery Row.

386 ► California, Monterey County, Monterey — The Real “Docs” — Historic Cannery Row —

Near Cannery Row at Bruce Aris Way (Irving Avenue).

387 ► California, Monterey County, Monterey — There was a cannery here before the aquarium — Hovden Cannery — Monterey Bay Aquarium —

On Wave Street / Ocean View Boulevard at David Avenue, on the right when traveling east on Wave Street / Ocean View Boulevard.

388 ► California, Monterey County, Pacific Grove — Hopkins Marine Station — Hopkins scientists study the biology of the bay —

On Ocean View Boulevard at Eardley Avenue, on the right when traveling west on Ocean View Boulevard.

389 ► California, Monterey County, Pacific Grove — Trimmer Hill —

On 6th Street at Laurel Avenue, on the right when traveling south on 6th Street.

390 ► California, Napa County, Napa — Napa - Birthplace of the Loudspeaker and the Magnavox Corp. —

On First Street west of Main Street, on the left when traveling east.

391 ► California, Napa County, Napa — Napa State Hospital —

On Magnolia Drive at North Oak Drive on Magnolia Drive.

392 ► California, Napa County, St. Helena — Robert Louis Stevenson —

Near Library Lane.

393 ► California, Nevada County, Nevada City — 400 Broad Street —

On Broad Street at York Street, on the right when traveling west on Broad Street.

394 ► California, Nevada County, Norden — McGlashan Point —

On Donner Pass Road, on the left when traveling east.

395 ► California, Nevada County, Soda Springs — Central Sierra Snow Lab — Hwy 40 Scenic Bypass —

On Donner Pass Road near Bunny Hill Drive, on the left when traveling east.

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396 ► California, Nevada County, Soda Springs — Snowshoe Thompson —

Near Bunny Hill Drive near Interstate 80.

397 ► California, Orange County, Anaheim — Boeing Autonetics — Anaheim, Calif. —

On La Palma Avenue 0.2 miles east of Kraemer Boulevard, on the left when traveling east.

398 ► California, Orange County, Anaheim — Michelle Carew Community Courtyard —

Near Gene Autry Way.

399 ► California, Orange County, Costa Mesa — Apollo 11 — July 20, 1969 — Astronaut - Neil Armstrong —

Near Nevada Street at California Street.

400 ► California, Orange County, Cypress — Challenger Crew —

Near Orange Avenue.

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