The Grand Canyon of Texas.

Visit the monolithic tomb of America's most famous general.

The summer home of the largest colony of bats in the world.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

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

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

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

A Prada store in the West Texas desert that is never open for business.

Free public park and gardens filled with peacocks and peahens.

A bit of retro transportation flair preserved in the world's largest department store.

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

An abandoned quicksilver mining town surrounded by the Big Bend parks.

New York's oldest and possibly grandest keeper of books.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A cave's rare beauty held a cavernous secret hidden underground.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

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

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This historic national park is covered in the stunning ruins of red rock pueblos.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

Lie in a hammock where George Washington stood.