This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Fantastic lake on the heart of a fault line.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

Sweden's "good old days" painstakingly re-created in a model village.

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

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

Home to 200 plaster casts of Scandinavian proboscises.

This Swedish astronomical clock was in storage for almost a century before its glorious workings were put on display once more.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

A neolithic tomb converted into a tiny chapel.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

Abandoned railway line circling the city of Paris.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

An eerie, derelict amusement park in Berlin.

The site of good faith and good nature in the fictional world of Kcymaerxthaere.