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

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

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

In a long-dry lake bed, these groups of massive stone pillars bear a striking resemblance to clumps of everyone's favorite fungi.

Mysterious standing stone formations looks like a petrified forest.

"Unity, Creativity, Beauty."

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

Eastern Bloc nostalgia, anybody?

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

UNESCO-protected ancient burial ground.

A striking symbol of the Bulgarian capital.

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

A flamboyant five-story building in Bulgaria resembles a crawling snail.

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.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

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

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

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

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