This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

These abandoned vessels are destined to be reclaimed by the forest.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

This lurid German fountain plots the sad course of marriage from dating to death.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

France's high-tech, future-themed amusement park.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

A chapel on a volcanic core, marking the end of a successful journey.

The world's tallest bridge is also possibly the most elegant.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A Gothic cathedral created from volcanic rocks.

Historic medieval fortified city in southwest France.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Oriental bazaar in the heart of Sarajevo.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

Bridge that died in war and was resurected.

Visitors dip into a variety of pools of what was once ice.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.