This ancient structure is widely thought to be the oldest intact pyramid in the world.

Rock carving created 1,300 years ago 75 feet off the ground.

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

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

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

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

Something's watching you.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

What happens when you cross a mayor and a painter?

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

This striking structure is the Socialist-modernist centerpiece of a former Soviet spa resort.

A tiny traditional village keeps an ancient method of beekeeping alive.

The oldest funicular in Lithuania has been climbing this steep hill since 1931.

Ever-growing collection of devils in art.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.