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

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

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

This attraction was abandoned after the Chernobyl disaster.

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

This ghost town in Belgium will lose its street art when it ceases to exist.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This abandoned Belgian fortress is purposefully being left to nature.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

Abandoned since 1998, this train station has become an oasis for urban explorers.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

A pilgrimage site where people ask Saint Dymphna to watch over those who are not of sound mind.

The private train station King Leopold II built for the Belgian royal family now lies abandoned.

Six turbines towering over a wide road for passersby.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

A landscape decorated with enormous skull sculptures.

This tower once served as a radar station during the Cold War.

A naturally occurring amphitheater carved by erosion into the mountainside.

A glacial valley filled with silver beech trees in the mountains of Portugal.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

Local lore says the devil built this beautiful medieval bridge to help a fleeing bandit.

A unique seaside cave where Aleister Crowley faked his own death.