The land is home to swimming ponies and a legendary 18th-century treasure.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A haunting tribute to pioneering photographer Clover Adams.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

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

The site of the climactic scene from the classic horror film is now a historic landmark.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

The ancient tomb acts as a calendar that keeps perfect time.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

Go inside to really appreciate this 500-year-old technological masterpiece.

Venice's island of the dead.

One part local history, 99 parts gruesome haunted house.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Former self-sufficient mental institution now a planned community.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.