The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

The ancient latrines of the Greeks, in all their public glory.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This small-town pizzeria won the Hollywood lottery.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

World's first "penitentiary," meant to be humane, drove men insane.

FDR's Art Deco hospital tower was hopelessly inefficient.

A celebrity from the late Cretaceous period.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Washington's iconic carousel has a nice piece of Civil Rights history.

An overlooked memorial honoring the local Washington residents who died in World War I.

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

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

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.