This award-winning men's bathroom was just too beautiful to not allow women to see.

This replica of the Greek structure is in the heart of Nashville.

A vertical tube that allows you to see what's going on underneath the Antarctic sea ice.

Ch-Ch-Check out the world's largest hand-painted 3D mural.

A menagerie of concrete animals brought together from across New York City's parks.

These whimsical rabbit figures are not as innocent as they might look.

An emerald-green grotto just a short trip from Austin.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A self-built castle made by a mysterious man.

A former department store turned into a quirky restaurant.

Over 100 lasers, including huge ones that look straight off a sci-fi set.

The first permanent memorial to a unique secret weapon of World War II.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

Once disputed as the largest sundial in the world.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A geological mystery on Camelback Mountain.

A historic hydroelectric power plant serves as the unusual backdrop for a public park.

The exit of the largest prisoner-of-war escape attempt on American soil during World War II.