Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

Bacteria and algae give the salty water its bubblegum hue.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A narrow strip of land is home to the tallest migrating dunes in Europe.

This ornate church has survived Nazi and Soviet occupation, including a short stint as a Soviet-era gymnasium and cinema.

The reconstruction of this prominent building fulfilled a long-written command.

Flamboyant architecture from the turn of 20th century.

The oldest housing complex in Riga is a mini timeline of architectural trends.

3,000 market stands in five former Zeppelin hangars.

A massive cross stands as the sole resident of this water-locked Crimean crag.

This ancient burial mound is accessed by an impressive Greek-built archway.

A subterranean house of worship carved right out of the bedrock.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

Theme park featuring miniature replicas of European monuments.

Cozy basement bar sports an inventory of over 2,000 beers.

Climb inside an iron crystal magnified 165 billion times its normal size.

Rome’s legendary peephole vista is also a former Crusader stronghold.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The hallucinogenic center of the ancient world.