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

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Unique house covered in a nightmarish mural of demons, ghosts and monsters.

This simple apartment may have inspired some of the most important theories in the history of science.

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

A unique collection of Swiss art brut and naïve art displayed in an old warehouse.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

A gorgeous stone viaduct crosses over a bucolic valley.

Moss and stone turn this waterfall into an otherworldly liquid veil.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Beautifully carved tombstones fill this unmarked graveyard, uniquely situated near the village's famous stone wine cellars.

In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The sumptuous ceiling was one of the last things Charles I saw before his execution.