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

One of the newest mosques in a city filled with thousands.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

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

A Soviet-style monument, built after transferring the remains of heroes from their graves.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

Something's watching you.

This massive underground salt mine now holds a sci-fi theme park in its depths.

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.

A collection of items from a way of life that no longer exists.

A pair of connected skyscrapers form this symbolic gateway.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

This feat of Brutalist architecture is also known as the Three Sisters.

The place where World War I began.

A war-torn Olympic relic is being overtaken by graffiti and nature.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

A futuristic, brutalist masterpiece that is also strangely prison-like.

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

A naturally beautiful, seemingly bottomless deep blue spring.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.