Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Giant topiary dog once played a role in a terrorist bomb plot.

This 19th-century fountain's namesake animal isn't what you think it is.

Unchanged for centuries, this medieval library keeps its books in chains.

Over time, this castle grew to encompass the entire island.

Open-air museum with a large collection of Soviet-era statues.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

Old cabin-like homes in a rural community untouched by time are known for their vibrant and colorful window shutters.

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

An underground city of salt.

This grubby wall is said to be one of the Earth's esoteric energy centers.

Inside this Krakow church, an explosion of psychedelic color.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

This fairytale medieval church in Poland originally spent centuries in Norway.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

One of the most iconic neon ads of former East Germany.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Wander among free-roaming storks at the sanctuary that helped save them from local extinction.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

Two gravestones clasp hands over the religious divide.