The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

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

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.

"Unity, Creativity, Beauty."

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

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.

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

A striking symbol of the Bulgarian capital.

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

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

This historic black and white monastery is one of Bulgaria's architectural jewels.

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

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

An abandoned saucer-shaped monument in the Bulgarian mountains.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.