Two 2,500-year-old Phoenician boats found on the coast of Spain, giving incredible insight into the ancient maritime traders.

Remnants of the rich history of fish salting in this ancient Mediterranean port town.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

This massive subterranean fissure is known as the "underground Grand Canyon."

The only gulag ever to exist in socialist Yugoslavia.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

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

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

The world's newest astronomical clock is also its most accurate.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

A miniatures park with a model of Wolf's Lair as it looked during World War II.

This hilltop ruin is of the hundreds of stone columns built in tribute to the first German chancellor.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

A carriage house converted into what resembles an 11th-century English manor house

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