Five candy-colored villages on the Italian Riviera.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

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

Dine amidst exotic plants at this former royal greenhouse.

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

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

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

The first modernist church in Europe.

Sealing couples' love since just after World War I.

Stone age urban planning.

A misnamed well, with a deep dark past.

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

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Southern Italy's spinning top village.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.