The world's oldest known salt mine.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Medieval torture techniques with a modern conscience.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A sprawling collection of over 106,000 toys from around the world.

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

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Hear the quietest sound from across the dome.

The largest greenhouse in the world is home to over one million types of plants.

400-year-old garden, restored to beauty.

A midnight snack that lights up the night.

Want to properly offend a king? Sculpt a giant hill figure in chalk of him riding out of town.

A open air theatre built on a cliff by an eccentric British woman.

Famously misunderstood wonder of the ancient world

Twisted buildings adorn the banks of the Rhine river.

A taxidermied stork with an arrow through its neck proved that birds migrate.