Sofia's legislative center is continuously reinventing itself.

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

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

A mysterious tunnel hidden in the shadows of a colorful, historic sanctuary.

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

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

Eastern Bloc nostalgia, anybody?

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

Mysterious standing stone formations looks like a petrified forest.

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

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

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

A striking symbol of the Bulgarian capital.

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

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

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

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.

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

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.