These natural cliffs look like they are a part of an old castle complex.

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

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

Mysterious standing stone formations looks like a petrified forest.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

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

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

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

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

Sofia's legislative center is continuously reinventing itself.

This building has two facades of clashing architectural designs.

A striking symbol of the Bulgarian capital.

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

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

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

Artists made this mosque into a marvel of Ottoman baroque architecture.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.