One of the windiest peaks in Crimea is home to an incredible set of cable bridges.

This space age health spa looks like a supervillain's lair.

Over 300 wood sculptures depicting characters from Slavic, Greek and Western folk tales fill this magical garden.

One of the cave cities of Crimea, built by the Goths in the sixth century.

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

At almost 900 feet long, this is Bulgaria's longest suspension bridge and the only way to reach the small village of Lisitsite.

While it would not look out of place among Serbian spomeniks, this massive Bulgarian monument commemorates one of their defeats.

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

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.

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

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

"Unity, Creativity, Beauty."

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

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

A striking symbol of the Bulgarian capital.

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

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

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

An architectural marvel that spans the Arda River, and has stories of a haunted past.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

An abandoned brutalist monument whose history has been lost to the ages.