This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

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

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Mile-long cave system near Great Smoky Mountains.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A tribute to Ponce de Leon's supposed quest for eternal youth.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

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

A grove of colossal man-made flowers built to collect the sun's rays.

A view-altering observatory at the University of Texas.

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 failed condo development was reborn as a street art hub.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Official museum, hall of fame, and repository of the Texas Rangers.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

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

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

An acoustic anomaly with a mysterious cause.

Home with Gothic windows featured in a famous painting.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.