These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Natural rock water slides hidden in the remote forests of northern Idaho.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

Home to the deepest rift anywhere on Earth.

The cliff and rock formations are made out of Sioux Quartzite.

Chef Lawrence West serves up Indian tacos, wojapi, and other Lakota dishes at the brick-and-mortar incarnation of his popular food truck.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

A fitting attraction for the corn capital of the world.

The easiest way to the highest point in Wyoming is only accessible via one hefty fee.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

A devilishly named gorge that was a sign of salvation for many pioneers.

Miraculous tree that seems to sprout out of solid rock.

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

A small Wyoming town is home to the state's oldest-operating soda fountain.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

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

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

One man's ambition created this psychedelic log home.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

One North Dakota man's vast collection of rare rocks, polished orbs, and geological wonders.

This museum is a full-size replica of an original church constructed during the 13th-century.

A monument to the center of the North American continent may be off by a few miles.