An homage to the medieval rulers of Bulgaria.

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

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

A striking symbol of the Bulgarian capital.

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.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

This natural gas vent certainly earns its name as the smallest volcano in Italy.

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

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.