A unique project to help restore coral reefs in Bali.

An abandoned marine theme park has created a difficult experiment in dolphin rewilding.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This massive underground salt mine now holds a sci-fi theme park in its depths.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

World's strongest whirlpool.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

This nugget of paradise earned its name for obvious reasons.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Things aren't quite what they seem at this mind-bending museum.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

The remains of a sunken military ship wreck visible through clear water.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

A musical instrument played by the sea.

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

Iron Age "bog person" preserved for over 2,300 years.