The world's longest known cave system.

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

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Nature's biggest mammal swims in landlocked Oklahoma.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

Tucked away down this Baytown alley exists a one-of-a-kind art exhibit of technicolor umbrellas.

A taste of Middle Earth, in the middle of the Bayou City.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

A park filled with vibrant mosaics created by more than 300 folk artists.

Beer lover's can-covered house.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

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

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

A modernist landscape of water and sci-fi concrete.

Only known mainland rookery of the threatened Stellar sea lion.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

On the Oregon coast is a natural hole that seems to be draining the sea.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.