Ruins in Bulgaria

This fifth-century church is one of the oldest Christian sites in the Balkans.

An abandoned sanatorium building from the early 20th century sits in the forest of the Rila mountains.

On the outskirts of the small village, an abandoned grassy field glitters thanks to the white stones of an ancient structure.

Sofia's legislative center is continuously reinventing itself.

An abandoned saucer-shaped monument in the Bulgarian mountains.

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

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

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

UNESCO-protected ancient burial ground.

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