The skeleton of a whale that beached itself in this Irish town is now on display in their public park.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

A 12th century church completely covered in shells.

This abandoned naval battery stood at the ready as recently as the 1980s.

A submerged village appears when dam levels drop.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Museum celebrating the history of computers, especially their role in codebreaking.

Fantastically decorated underground chambers built in the 1760s.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

A museum in the childhood house of a medical pioneer.

The Titanic sails again in one Scotland man's backyard.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Mysterious painted skulls in Moravia.

The first island in the world designated a light-pollution-free astronomical observation point.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

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

Staves, storm-calling, and of course, necropants.

The world's largest collection of witchcraft regalia.

Enter the cabin of a life-sized Hindenburg replica.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

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

An unrealized dream to wirelessly electrify the entire Earth.