The footprint of a frustrated devil in Munich's Cathedral.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

Where condemned pirates met their grisly end at the gallows on the River Thames.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A ruined castle stands atop a hill surrounded by dragon lore.

The highest cold-water geyser in the world.

This unique Renaissance castle was turned into a home for Nazi occultism.

Quite simply the largest tree in the world (by volume).

Catch a glimpse of local, native wildlife at this zoo dedicated to conservation and education.

In this breathtaking canyon, crocodiles bask on boulders and glide through the murky waters.

This historic Mexican convent is home to a tree that grows crucifix-like thorns.

It was dubbed the "Garden of Plates" because it's covered in pieces of discarded dishes.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Rebuilt remains of a temple to Roman god Mithras.