Population: 1.

A popular rock that acted as a waymarker for American pioneers.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

A miraculous natural phenomenon known as "the spring that breathes."

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

One man's ambition created this psychedelic log home.

Native Americans built this circle of stones, which was used to predict astronomical events.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

Mining town from the late 1890s, once home to Calamity Jane.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

New fungal and bacterial species call this deadly lake home.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

Limestone caves with spectacular showcase chambers.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Eons ago, a rushing lava river formed this pristine passage through solid rock.