Step inside this medieval Orthodox gem and travel back to the 16th century.

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

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

One of the world’s only pink lakes where it's possible to take a dip.

An homage to the medieval rulers of Bulgaria.

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

Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

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

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

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

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

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

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

Mysterious standing stone formations looks like a petrified forest.

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

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

"Unity, Creativity, Beauty."

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

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

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

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

A striking symbol of the Bulgarian capital.