This abandoned Soviet circus is slowly being restored to its Communist-era glory.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

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

A striking symbol of the Bulgarian capital.

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

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

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

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Abandoned Japanese ghost town gives a glimpse into what our own metropolises may leave behind.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The Avenue of Mausolea is a series of grand palatial tombs.

A decommissioned submarine base makes a great space for graffiti art.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

These red marks, seemingly placed at random, are in fact not.

The tomb of a hard traveling saint is constantly covered in shoes as offerings to heal disabled youth.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

France's highest manned weather station is the only one still inhabited by meteorologists.

A castle-like sea fort from the 17th century is now a museum to oyster farming.

A towering baroque basilica jutting out of the French countryside.