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

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

This underground transport hub doubles as an art gallery.

An Art Nouveau building covered in animal gargoyles and grotesques.

The deepest metro station in the world.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

Padlocks cover this rickety footbridge with love.

Featured in one of the most iconic scenes in cinema history.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

The largest catacomb system in the world.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chornobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

This derelict superstructure was a very important warning system for the Soviet military.

The dining hall that nourishes workers in Chornobyl's Exclusion Zone is also open to visitors.

When the sun sets, the customers arrive—but they’re not human.

Ecuador’s historic seat of government has been quietly looted in recent decades, and no one knows how or by whom.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.

This historic street in Quito is known for its seven stone crosses—and one presidential assassination.