Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

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

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

Steep canyon walls hide a forested oasis in the West Texas desert.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

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

A popular swimming hole that hides one of America's most deadly diving spots.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An eerie site of reverence for those who have completed an epic journey.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

The mysterious 855-foot zigzagging stone wall has been baffling people for centuries.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

Could this grave be the true resting place of legendary gunfighter "Doc" Holliday? Unclear.

Interactive modern and vintage submarine equipment, World War II relics, and submarine attire.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.