An incredibly well-preserved piece of ninth-century Viking poop.

Tucked along a river are enigmatic stone carvings created thousands of years ago.

This museum inside a museum tells the story of London's timepieces.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

This belfry is all that remains of the town that was buried by a violent volcano eruption.

The singular ruins of a mysterious lost city.

More than 100 Hindu temples are slowly being swallowed by the forest.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

Transport yourself to the 1980s era of video games at this themed restaurant and bar.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

Haunted house kitsch meets Japanese folklore at this theme bar where patrons can “die” and have their own mock funeral.

Not far from Madrid, a set of perfectly preserved trenches date back to the Spanish Civil War.

One of the world's largest pyramids stands within El Mirador, the "lost city of the Maya."

You can crawl inside this atmospheric 5,000-year-old tomb.

Where the rules of that most quintessentially English game were first devised by an eccentric inventor.

At this museum in Iceland, visitors can sample fermented Greenland shark.

A 19th-century smallpox cemetery is being reclaimed by scrub forest and sand dunes.

A spiritual sanctuary in a natural cave.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

A network of concealed passageways lies within a busy London Underground station.

This modern labyrinth lies in the shadow of a ruined medieval castle.

A Swiss man built this airstrip for aliens because a UFO captain telepathically told him to.