Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

This elegant arc of a waterfall marks a religious turning point.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

A pixel art killer whale is frozen mid-leap in this Vancouver square.

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

A theme park attraction designed to turn your children into LARPers.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

A bizarre house filled with an astounding array of collections.

This 16th-century house tells the city's history through old artifacts and quirky tales.

Now home to a drinking establishment, this building has a macabre history.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Eighty million natural history specimens call this gargantuan museum home.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Notorious artist squat renovated into legal studios.

A cluttered and astounding collection of antiquities and curiosities.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This steep slide at a kids’ playground went viral after an police officer tumbled down it.