59 entries match your criteria.
National Natural Landmarks Historical Markers
Department of the Interior markers at sites possessing exceptional value illustrating the nation’s natural heritage and contributing to a better understanding of man’s environment.1 ► Alabama, Jackson County, Woodville — Cathedral Caverns — |
2 ► American Samoa, Vaifanua County, Vatia — Vai'ava Strait — |
3 ► Arizona, Coconino County, Jacob Lake — Kaibab Squirrel Area — |
4 ► Arkansas, Fulton County, Mammoth Spring — Mammoth Spring — National Natural Landmark — |
5 ► California, San Bernardino County, Amboy — 92 — Amboy Crater — National Natural Landmark — |
6 ► California, San Bernardino County, Trona — Welcome to the Trona Pinnacles — ... a National Natural Landmark — |
7 ► California, Shasta County, Burney — Burney Falls — |
8 ► California, Siskiyou County, Mt. Shasta — Mount Shasta — |
9 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — A Priceless Gift — Garden of the Gods Park — |
10 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — Garden of the Gods Park — |
11 ► Colorado, El Paso County, Colorado Springs, West Colorado Springs — Time Frozen In Stone — Garden of the Gods Park — |
12 ► Colorado, Jefferson County, Morrison — Morrison Fossil Area — National Natural Landmark — |
13 ► Florida, Alachua County, Gainesville — Devil's Millhopper — Registered Natural Landmark — |
14 ► Florida, Alachua County, Gainesville — Living Links to Florida's Past — |
15 ► Florida, Collier County, Naples — What Makes Corkscrew Swamp Special? — National Natural Landmark — |
16 ► Florida, Wakulla County, Wakulla Springs — F-394 — Wakulla Springs Archaeological & Historic District — |
17 ► Idaho, Cassia County, Oakley — 344 — City of Rocks — |
18 ► Illinois, Monroe County, Fults — Fults Hill Prairie — |
19 ► Indiana, Crawford County, Marengo — Marengo Cave National Landmark — |
20 ► Indiana, Fountain County, Covington — Portland Arch Natural Preserve — |
21 ► Indiana, Porter County, Dune Acres — Dune Creek Watershed: What Makes It Special? — |
22 ► Indiana, Wabash County, Lagro — Hanging Rock — National Natural Landmark — |
23 ► Kansas, Ottawa County, Minneapolis — Welcome to Rock City — |
24 ► Missouri, Oregon County, Koshkonong — Grand Gulf — |
25 ► Missouri, Stone County, Branson — Marvel Cave — |
26 ► Nebraska, Grant County, Hyannis — Nebraska Sand Hills — National Natural Landmark — |
27 ► Nevada, Clark County, Overton — Valley of Fire — |
28 ► New Jersey, Somerset County, Franklin Twp — William L. Hutcheson Memorial Forest — National Natural Landmark — |
29 ► New York, Albany County, Albany — National Natural Landmark — |
30 ► New York, Monroe County, Fairport — Hart's Woods — |
31 ► Ohio, Ashland County, Loudonville — 6-3 — Clear Fork Gorge — A Feature of Ohio's Forests — |
32 ► Ohio, Champaign County, Urbana — Cedar Bog — |
33 ► Ohio, Champaign County, Urbana — 6-11 — Cedar Bog Nature Preserve — |
34 ► Ohio, Cuyahoga County, Walton Hills, Sagamore Hills Township — Tinker's Creek is Gorgeous — Cleveland Metroparks — |
35 ► Ohio, Fulton County, Archbold — Goll Woods — 100 Acres of Virginia Timber — |
36 ► Ohio, Greene County, Clifton — Clifton Gorge Marker — The Old Trail Head — The Obscure Marker — |
37 ► Oregon, Lake County, Fort Rock — Fort Rock State Park — |
38 ► Pennsylvania, Berks County, Kempton, Albany Township — Hawk Mountain Sanctuary — |
39 ► Pennsylvania, Carbon County, White Haven — Hickory Run Boulder Field — Hickory Run State Park — |
40 ► Pennsylvania, Erie County, Erie, Millcreek Township — Presque Isle — |
41 ► Pennsylvania, Fayette County, Connellsville — Connellsville — Trail Map and Points of Interest — |
42 ► Pennsylvania, Lycoming County, Jersey Shore, Watson Township — Glacier to Gorge — An Incredible Diversion — Pine Creek Rail Trail — |
43 ► Pennsylvania, Philadelphia County, Philadelphia, Logan Square — Wissahickon Valley — 1868 — Parkway Museums District — |
44 ► Pennsylvania, Philadelphia County, Philadelphia, Roxborough — Park Directory — Wissahickon Valley Park — |
45 ► Pennsylvania, Philadelphia County, Philadelphia, Wissahickon Valley Park — Forbidden Drive — 1869 — |
46 ► Pennsylvania, Philadelphia County, Philadelphia, Wissahickon Valley Park — Park Directory — Wissahickon Valley Park — |
47 ► Pennsylvania, Tioga County, Shippen Township — Pine Creek — Grand Canyon of Pennsylvania — |
48 ► Pennsylvania, Wayne County, Lake Ariel — Lake Lacawac — |
49 ► South Dakota, Charles Mix County, Pickstown, White Swan Township — Fort Randall Eagle Roost — |
50 ► South Dakota, Fall River County, Hot Springs — 680 — Mammoth Site of Hot Springs, SD — |
51 ► South Dakota, Harding County, Reva — The Castles — |
52 ► South Dakota, Roberts County, Browns Valley — 547 — Ancient River Warren Channel — |
53 ► South Dakota, Roberts County, Sisseton — Sieche Hollow — |
54 ► Vermont, Lamoille County, Stowe — Mount Mansfield Natural Area — National Natural Landmark — |
55 ► Virginia, Page County, Luray — Luray Caverns — |
56 ► Virginia, Page County, Luray — The Beautiful Caverns of Luray — Welcome to Luray Caverns — |
57 ► Virginia, Rockingham County, Grottoes — Grand Caverns — |
58 ► Washington, Whitman County, Steptoe — 31 — Steptoe Butte — The Evergreen State — |
59 ► West Virginia, Greenbrier County, Caldwell — Confederate Saltpeter Works — Civil War Industrial Center — |