The stones of this formerly witch-obsessed castle were used to build a church.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

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

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

King Ludwig I's collection of beautiful women.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

Living trees form the structure of an open-air palace.

A monument to the "father of modern warfare" Gustav II Adolf.

The final resting place of many of Germany's most famous communists.

A city's controversial tribute to its founder depicts townspeople flashing their bare behinds.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

In this coastal town, the time-honored tradition of reenacting the struggle between the Christians and Moors includes the arrival of the Moorish fleet.

This 47-story "M" needed 20 years to be completed

This massive blockhead sculpture hides an entire library.

The location of the last witch trials of Italy, known as "The Salem of Europe."

This winding road through an Italian canyon may be the most scenic drive in the world.

A sunken idol welcomes parishioners to Davy Jones' Locker.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

Massive galleon from a box-office bomb docked in Genoa.

Legends surround an ancient tree trunk riddled with nails for good luck.