Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Abandoned railway line circling the city of Paris.

The final resting place to 300 Victorian-era pets hides inside the city park.

A student driver's nightmare.

A hands-off space for graffiti artists to hone and display their skills.

This South London cemetery holds the remains of more than 15,000 people.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The world's northernmost aquarium looks like it has fallen over.

An aluminum skeleton brings Chinese mythology to the French shore.

Personal garden filled with mosaics made of recycled garbage.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

An abandoned beach resort in Normandy reclaimed by artists.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Rising from the sea like a stone monster.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.