Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

The highest bridge in America was built for an almost unnervingly small amount of money.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This abandoned building made of petrified wood was once a hotspot for buying moonshine.

Nestled in the heart of a Texas town is a dreamy secret garden dating back to the 1940s.

In the late 1990s, a mechanic and fan bought this iconic sportscar back from the dead.

This former Texas landfill is flush with 300 million-year-old fossils, all fit for the taking.

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

A view-altering observatory at the University of Texas.

The oldest active mini golf course in the U.S. has an elegant Art Deco style filled with lush tropical plants.

These boots are made for selfies.

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

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

A Muppet museum in small-town Mississippi honors the roots of Jim Henson's most beloved creation.

Mile-long cave system near Great Smoky Mountains.

Visit this playground of waterfalls, caves and sinkholes.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

This botanical garden has been nicknamed "Alabama's Little Corner of Greece."

A collection of huge Pre-Colombian structures in Alabama.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

This ancient settlement contains some of the largest earthen mounds in North America.