An abandoned saucer-shaped monument in the Bulgarian mountains.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

Peek into the world of those creating the beautiful, delicate paper parasols found all over the globe.

A shrine built to combat the bad karma of a commercial venture.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

Pop culture has helped to keep this iconic British building from being destroyed.

Largest lake in Great Britain measured by surface area.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The heads of two giant mythological water horses honor Scotland's horselord past.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

A whimsical bridge adorned with decorative dragons.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This one-time health resort was used by aristocrats around the world.

This Transylvanian church has changed its denomination four times.

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.

A medieval church built up to defend its village.

Something's watching you.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

This snug medieval lane is one of the narrowest streets in the world.