A reproduction of earth's many biomes.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

This frequently-photographed waterfall takes only a short hike to visit.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Take a drunken tour inside the world's largest known geode.

A beautiful 62-acre Catholic shrine and botanical garden.

A modernist landscape of water and sci-fi concrete.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

A museum dedicated to the alleged Roswell Incident.

The world's longest known cave system.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Explore 10 acres of environmental sculptures.

The magic's in the hole!

One person's lost luggage is another person's treasure.

A museum dedicated to the history and exploration of both popular music and science fiction.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.