Legend said this huge, gnarled tree sheltered the saint during a storm.

The former home of an Italian artist is now a shrine to his ambitious works.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

A huge enchanting public park just outside the ancient walls of Rome.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A 17th-century doorway in a small Sabine village is a portal into the mysteries of alchemy.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

Contrary to what its name suggests, you won't find any bunnies here.

A 2,000-year-old engineering wonder hides beneath an Italian town.

Abbey built on the ruins of Roman catacombs.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

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

Ruins of an early Roman Christian church dating back to the 4th to 5th centuries.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

Eastern Bloc nostalgia, anybody?

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

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

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