A rare rune stone dedicated to a woman.

Few would expect the world's oldest preserved oil refinery to be found in Sweden.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

Said to be one of Sweden's most haunted places, this vicarage once even attracted a ghost-busting priest.

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

The library's graceful rotunda is like a bibliophile's temple.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

A concrete Picasso in the middle of a student housing complex on the outskirts of Stockholm.

The palace for King Gustav III was never completed, but the foundation remains tucked away in this city park.

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

For those late-night mollusk cravings.

The suspected burial mound of legendary Viking Björn Ironside.

This hilltop ruin is of the hundreds of stone columns built in tribute to the first German chancellor.

1513 Turkish world map, full of European state secrets and snarky commentary.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

The atmospheric road was never meant to be so creepy.

Have fun at the world's first Buddhist waterslide park.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

Terrapins of all colors and shapes are quick to bring fascination (and possibly long life) at this museum.

In this Balinese village, coconut shells containing placentas are hung from trees.

It took 28 years to build this massive statue of the Hindu god Vishnu riding a mythical bird.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

The wing of this deserted Boeing 737 almost touches the Dunkin' Donuts next door.