A former imperial sea-fortress and Soviet prison.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

This now abandoned restaurant provides some of the most amazing views of Lisboa.

The best place in the world to buy tinned fish.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

A vault of safe-deposit boxes in an old bank has been repurposed as a time capsule of Hispanic culture.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

An ancient Egyptian temple in the middle of Madrid, Spain.

1,300 chamber pots and their eccentric collector.

A stately palace has been converted into the world's largest cannabis museum.

Abandoned waterpark turned counter-culture mecca.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

The morbid items in this small and hidden museum are not for the weak stomached.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

Cliffside houses provide a spectacular view from their perch above the valley.

This house's itty bitty size means no humans allowed.

A landscape decorated with enormous skull sculptures.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.