These abandoned grain silos and tunnels are an urban exploration dream.

A monument to the art of slicing people open.

This shop for all your super spy needs hides an educational secret.

A massive collection of rare and antique books in a tiny ranching community in northern Texas.

This extinct shield volcano is the lightning rod of the Cascades.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

"May the force be with you always."

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Visitors to this library are in for a real-world education in modernist architecture.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

The remains of a former logging boom town, crumbled away in the forest.

A whimsical village of unique treehouses resides in a Washington forest.

This unique library spans a mighty river.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

A museum dedicated to man's boldest venture.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

"Dallas’s pretty much only carnivorous plant gallery."

All that remains of this small town is its mass grave and a myth of a voodoo priestess who predicted its demise.

A swamp and garden tour featuring local wildlife and exotic botanical specimens from around the world.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.