1 ► Arizona, Coconino County, Flagstaff — Lowell Observatory — National Historic Landmark —

Near West Mars Hill Road 0.6 miles west of West Santa Fe Avenue.

2 ► Arizona, Pima County, Haivana Nakya — WIYN Observatory —

On Arizona 386 12 miles south of Arizona 86, on the right when traveling south.

3 ► Arizona, Pima County, Tucson, Kitt Peak — Kitt Peak National Observatory —

On Arizona Route 386 12 miles south of of W. Tucson-Ajo Hwy. ( Route 86), on the left when traveling south.

4 ► Arizona, Pima County, Tucson, Kitt Peak — Steward Observatory —

Near Arizona Route 386 12 miles south of W. Tucson-Ajo Hwy. (Route 86), on the left when traveling south.

5 ► Arizona, Pima County, Tucson, Kitt Peak — The WIYN Observatory —

Near Arizona Route 386 12 miles south of W. Tucson-Ajo Hwy. ( Route 86), on the left when traveling south.

6 ► California, Alameda County, Berkeley — Observatory Hill —

Near Hearst Avenue at Euclid Avenue.

7 ► California, Alameda County, Oakland, Downtown Oakland — Chabot Observatory — Founded 1883 —

On Jefferson Street at 11th Street, on the right when traveling south on Jefferson Street.

8 ► California, Amador County, Volcano — 715 — Astronomical Observatory —

On Consolation Street at Main Street, on the right when traveling north on Consolation Street.

9 ► California, Amador County, Volcano — 715 — Astronomical Observatory —

On Shake Ridge Road 1 mile west of Rams Horn Grade, on the left when traveling west.

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

Near Sam Merrill Trail north of Echo Mountain.

11 ► California, San Bernardino County, Big Bear Lake — Big Bear Solar Observatory —

On North Shore Lane near North Shore Drive, on the left when traveling west.

12 ► Colorado, Clear Creek County, Idaho Springs — University of Denver — Meyer Womble Observatory —

Near Mt. Evans Road south of Colorado Highway 103.

13 ► Colorado, Denver County, Denver, University Park — 220 — Chamberlin Observatory —

Near East Warren Avenue just east of South Fillmore Street, on the right when traveling east.

14 ► Connecticut, Southeastern Region, New London — Coast Guard Academy Observatory —

Near Mohegan Ave. Pkwy. north of Williams Street, on the right when traveling north.

15 ► Delaware, Sussex County, Lewes, Lewes-Rehoboth Hundred — SC-252 — Transit of Venus Observatory —

On Savannah Road.

Paid Advertisement

16 ► District of Columbia, Washington, Northwest Washington, Foggy Bottom — U.S. Naval Observatory / The Prime Meridian —

Near 23rd Street Northwest south of E Street Northwest, on the right when traveling south.

17 ► District of Columbia, Washington, Southwest Washington, The National Mall — Phoebe Waterman Haas — Public Observatory —

Near Independence Avenue Southwest west of 4th Street Southwest, on the right when traveling west.

18 ► Florida, Gadsden County, Chattahoochee — Ellicott's Camp and Observatory — George Washington's Commissioner of Limits —

On River Landing Road 0.3 miles south of U.S. 90, on the left when traveling west.

19 ► Florida, Gadsden County, Chattahoochee — F-241 — Site of Ellicott's Observatory —

On River Landing Road 0.2 miles south of U.S. 90, on the left when traveling south.

20 ► Illinois, Champaign County, Urbana, Cunningham Township — The Astronomical Observatory —

Near South Mathews Avenue south of West Oregon Street, on the right when traveling south.

21 ► Illinois, Kane County, Elgin — Elgin National Watch Co. Observatory —

On Watch Street east of Raymond Street, on the right when traveling west.

22 ► Illinois, Kane County, Elgin — Observatory/Planetarium —

On Watch Street east of Raymond Street, on the right when traveling west.

23 ► Maine, Cumberland County, Portland, East End — Portland Observatory —

On Congress Street near North Street, on the right when traveling north.

24 ► Maryland, Montgomery County, Gaithersburg — History and Purpose of the Gaithersburg Latitude Observatory — Latitude Observatory Park —

On DeSellum Avenue 0.2 miles west of George Street, on the right when traveling west.

25 ► Maryland, Montgomery County, Gaithersburg — Meridian Mark Pier and Geodetic Survey Monuments — Latitude Observatory Park —

On DeSellum Avenue 0.2 miles south of George Street, on the right when traveling south.

26 ► Maryland, Montgomery County, Gaithersburg — The Observatory — Latitude Observatory Park —

On DeSellum Avenue 0.2 miles south of George Street, on the right when traveling south.

27 ► Michigan, Calhoun County, Albion — S0566 — The Observatory —

On East Cass Street, on the left when traveling west.

28 ► Michigan, Washtenaw County, Ann Arbor, Angell — 2 — The Detroit Observatory — 1854 —

On Observatory Street.

29 ► Mississippi, Lafayette County, University — Barnard Observatory —

On Sorority Row at Student Union Drive on Sorority Row.

30 ► Mississippi, Lafayette County, University — Barnard Observatory —

On Student Union Drive west of Sorority Row, on the right when traveling west.

31 ► Nevada, Carson City — 258 — Charles W. Friend House, Observatory, and Weather Station —

On North Stewart Street, on the left when traveling south.

Paid Advertisement

32 ► New Jersey, Middlesex County, New Brunswick — Daniel S. Schanck Observatory — 1866 —

Near George Street.

33 ► New York, Ontario County, Geneva, Castle Heights — Smith Observatory —

On Castle Street at Highland Avenue, on the right when traveling north on Castle Street.

34 ► New York, Ontario County, Phelps — Site of the Red House Observatory —

On Lester Road south of New York State Route 96, on the right when traveling north.

35 ► New York, Westchester County, Hastings-on-Hudson — 13 — Henry Draper and His Observatories / Henry Draper y Sus Observatiorios — Hastings-on-Hudson, New York — The Museum in the Streets® —

On Broadway (U.S. 9) south of Washington Avenue, on the right when traveling south.

36 ► Ohio, Hamilton County, Cincinnati, Hyde Park — 23-31 — The Cincinnati Observatory — "Lighthouse of the Sky" —

Near Observatory Place, on the right.

37 ► Ohio, Summit County, Hudson — Loomis Observatory —

On College Street, on the right when traveling north.

38 ► Pennsylvania, Allegheny County, Pittsburgh, Perry North — Allegheny Observatory —

On Riverview Avenue 0.2 miles west of Perrysville Avenue (U.S. 19).

39 ► Pennsylvania, Allegheny County, Ross Township, McKnight — First Aluminum Observatory Dome —

On McKnight Road (U.S. 19) at West View Avenue, on the right when traveling south on McKnight Road.

40 ► Pennsylvania, Chester County, Coatesville, Newlin Township — Site of Mason & Dixon’s “Stargazing” Observatory — 1764 —

On Stargazer Road at Embreeville Road (Pennsylvania Route 162), on the left when traveling south on Stargazer Road.

41 ► Pennsylvania, Montgomery County, Eagleville, East Norriton Township — Rittenhouse Observatory —

On West Germantown Pike.

42 ► Pennsylvania, Northampton County, Easton — Astronomical Observatory — 1865 —

Near Pardee Drive.

43 ► South Carolina, Aiken County, Aiken — Transit of Venus Observatory Structure, 1882

Near Newberry St SW near New Lane SW. Reported permanently removed.

44 ► Tennessee, Davidson County, Brentwood, Neighbors of Granny White — Vanderbilt Dyer Observatory —

On Oman Drive 0.2 miles north of High Valley Drive.

45 ► Texas, Jeff Davis County, Fort Davis — 10480 — McDonald Observatory of the University of Texas —

On State Highway 78.

46 ► Utah, Salt Lake County, Salt Lake City, University — 5 — Orson Pratt Observatory — Salt Lake City, Utah 1869 — Replicated in 2001 —

Near Main Street.

47 ► Vermont, Orleans County, Brownington, Orleans — Orleans County Grammar School and Prospect Hill Observatory —

On Hinman Settler Road north of Old Stone House Road, on the left when traveling north.

Paid Advertisement

48 ► Vermont, Windsor County, Springfield — Stellafane Observatory —

Near Breezy Hill Road 0.8 miles south of Monument Hill Road, on the left when traveling south.

49 ► Virginia, Bristol — Solar Observatory —

On Solar Street south of Sycamore Street, on the right when traveling south.

50 ► Australia, Victoria, Melbourne — Observatory Building — Melbourne Observatory —

Near Birdwood Avenue 0.2 kilometers west of Dallas Brooks Drive, on the right when traveling north.

51 ► Belgium, Région Bruxelloise, Bruxelles-Capitale, Saint-Josse-ten-Noode, Sint-Joost — Ancien Observatoire / Voormalig Observatorium / Former Observatory / Ehemalige Sternwarte —

On Place Quetelet, on the left when traveling west.

52 ► Nova Scotia, Cape Breton Region, Louisbourg — Canada’s First Observatory — Le premier observatoire au Canada —

Near Kennington Cove Road.

53 ► Ontario, Kingston — The Kingston Observatory / L’Observatoire de Kingston —

Near Barrie Street.

54 ► Québec, Capitale-Nationale, Québec, Montcalm — Quebec City Astronomical Observatory — Observatoire Astronomique de Québec —

On Avenue George VI at Rue Garneau, on the left when traveling east on Avenue George VI.

55 ► France, Île-de-France, Département de Paris, Paris, Montparnasse — L'Astronome Danois Olaus Römer —

On Avenue de l'Observatoire 0.08 kilometers south of Rue Cassini when traveling south.

56 ► France, Provence-Alpes-Côte d’Azur, Bouches-du-Rhône, Marseille, Hôtel de Ville — Ancien Observatoire de Marseille —

On Montée des Accoules at Rue de Refuge on Montée des Accoules.

57 ► Germany, Baden-Württemberg, Tübingen — 1 — Die historische Sternwarte... / The Historic Observatory... —

Near Burgsteige.

58 ► Germany, Bayern, Würzburg — Die Erste Sternwart der Universität Würzburg / The First Observatory of the University of Würzburg —

On Domerschulstraße at Neubaustrasse, on the right when traveling north on Domerschulstraße.

59 ► Mexico, Ciudad de México, Colonia Bosque de Chapultepec I Sección — National Astronomical Observatory of Mexico — Observatorio Astronómico Nacional —

Near Avenida Heroico Colegio Militar.

60 ► Mexico, Yucatán, Tinum, Pisté — The Observatory —

Near Carretera Costera de Golfo (at milepost 180), .

61 ► South Korea, Gyeongsangbuk-do, Gyeongju, Inwang-dong — Cheomseongdae Observatory, Gyeongju — 경주 첨성대 — National Treasure No. 31 —

Near no nearby street.

62 ► Switzerland, Zürich, Bahnhofstrasse — Urania Observatory — Uraniasternwarte —

On Uraniastrasse, on the right when traveling east.

63 ► United Kingdom, England, Greater London, Greenwich — The Royal Observatory —

Near Blackheath Avenue at Great Cross Avenue, on the left when traveling north.

Paid Advertisement

︽