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

The oldest church in Mantua was buried for centuries under the facades of other structures.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Pilgrimage site for star-crossed lovers.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

One of the oldest still-working clocks in the world sits on an ancient tower.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

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

This uniquely designed bridge served as the city gate for Comacchio.

The 1,000-year-old abbey is the birthplace of modern musical notation.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Sofia's legislative center is continuously reinventing itself.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

A vast Communist-era exhibition space in the Bulgarian capital.

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

A striking symbol of the Bulgarian capital.

A collection of art from Bulgaria's time as a communist state.

The facade of this bank has changed little over the centuries, including its unique welcome sign.

This bronze statue of Martin Luther King was placed in the park without permission.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.