One of the largest, oldest, darkest, quietest motel rooms in the world.

This large midwestern cavern features impressive rock formations and an underground waterfall.

The neighborhood shop is a sort of tiny cactus museum full of exotic specimens you can take home.

This popular bar has been blurring the line between normal and edgy for more than 75 years.

Travelers exchange letters with woodland creatures at this mini post office.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

An oddities shop that dabbles in the deathly and beautiful.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

A massive underwater sinkhole made famous by Jacques Cousteau.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

The Magical World of George Phar Legler.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The remains of a ruined mansion memorialize the 1906 earthquake.

A Saint Nicholas-themed ghost town in the Mojave desert.

Small museum packed with artifacts recovered by the man rumored to be the real-life inspiration for Indiana Jones.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The largest drain hole in the world.

This historic national park is covered in the stunning ruins of red rock pueblos.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.