The most visited, and possibly most controversial, museum in Germany.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

Europe's largest dinosaur museum was founded by a passionate autodidact.

These fantastically named natural pools look like something out of a Scottish myth.

A tilted half-timbered house from 1672 is built into a salvaged segment of a medieval wall.

Every July, men dressed as giant crows dance around a scarecrow who comes to life.

The red letters in the literary pavement leading to the library form a mysterious code.

A mysterious bridge over a sunken Roman road.

This fascinating cave is packed with prehistoric rock art and Stone Age tools.

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

The historic cave is both a symbol of superstition and black magic and inspired one of the early Christian converts in Botswana.

This lovely pocket park is one of the most under appreciated in D.C.

A jagged silhouette of shamanistic stone heaps rises from the shore of this dazzling mile-high lake.

A remarkably well preserved tower dating all the way back to the Iron Age.

This small museum in a 17th-century building honors three iconic Scottish writers.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

This imposing 20th-century castle was abandoned before it was ever completed.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

This rickety old shed hides a trove of secondhand literary treasures.