Thermal springs underneath the seabed provide the heat and bubbles for these beachside natural hot tubs.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

Walk 2,300 feet above the ground on the "Troll's Tongue."

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

Cliffside houses provide a spectacular view from their perch above the valley.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Wonderland replication in progress by one persistent man.

An archeological treasure trove stumbled upon by a couple of children.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

The "lovely red Vega" of the legendary record-settling pilot.

It was once the base for a series of domestic terror attacks.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

People escaping slavery may have hidden inside a corpse vault.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

Venice's "Island of the Mad."

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

A whimsical bridge adorned with decorative dragons.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

A musical instrument played by the sea.