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

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

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

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

This attraction was abandoned after the Chernobyl disaster.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

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

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

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

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

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

Moss and stone turn this waterfall into an otherworldly liquid veil.

Trimmed trees grow alongside the graves like topiary tombstones.

This Croatian computer club features such gaming relics as the infamous Virtual Boy and an 8-bit Pacman machine.

Island wonderland for communist autocrats.

The only gulag ever to exist in socialist Yugoslavia.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Humble beginnings for one of the world's most famous scientists.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

The remains of a sunken military ship wreck visible through clear water.