This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

This small chapel is built of human bones and decorated with a golden skeleton.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.

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

One of the smallest bookstores on the planet.

The best place in the world to buy tinned fish.

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

The beautiful 16th-century stepwell lies in the shadow of a famous fortress.

On East Burnside, a 24-hour vending machine distributes world-class pastries.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

Stockholm's narrowest alley is barely over two feet wide.

A Japanese video game arcade hides in the back of a Swedish pool hall.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

It's always game time at Stockholm's only museum devoted solely to video games.

It houses the remains of a 17th-century version of the Titanic.

Thanks to a bit of wordplay, seven auspicious stone cats guard this ancient canalside street.

This under-visited temple is nestled within one of Shanghai's traditional shikumen-style residential blocks.

A small gallery and shop dedicated to an ancient style of hand-printed textile.

The largest traditional Chinese medicine market in the world sells ingredients that may make you squirm.

Natives of this mud-brick desert village use an ancient irrigation system to grow sweet, seedless grapes.

A KFC honors an eighth-century Chinese poet with holograms and verse.