A supersonic jet stands on a pedestal in this rural village as a monument to military aviation.

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.

A decaying, yet still functioning, work of communist architecture.

A massive cave once a secret military base is now home to thousands of bats.

This building has two facades of clashing architectural designs.

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

Massive, unfinished broadcasting station stands as a monument to the fall of communism.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

Sofia's legislative center is continuously reinventing itself.

These cascading falls resonate throughout the Bulgarian forest.

Crossing a suspension bridge above a forest is the only way to reach this 12th-century monastery.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

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

Not far from a popular beach, an unfinished, abandoned mansion for Bulgaria's last communist dictator.

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

Ruins of an early Roman Christian church dating back to the 4th to 5th centuries.

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

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

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

"Unity, Creativity, Beauty."

Mysterious standing stone formations looks like a petrified forest.

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

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

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.