A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

At 207 feet, one of the world's longest continuous escalators.

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

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A massive tribute to this small county's top agricultural product.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Mile-long cave system near Great Smoky Mountains.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The first declared National Monument in the United States.

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

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Enormous lake at the bottom of a unique cave system.

A mysterious castle built as a monument to lost love.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.