One of the most easily accessible examples of the rare 1960s UFO houses.

The unusually large seat sits atop the base of a ruined temple.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

One of the world's heaviest musical instruments towers within a popular urban park.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

A 12th-century fortress containing some of Berlin's oldest buildings.

Art and a pun, all in one.

A monument to a Russian cruiser near its final resting place off the Ayrshire Coast.

This stately estate house features a tower covered in a bright, modern mural.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

A site of pagan worship which still attracts people looking for fairies.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

This Scottish bridge seems to compel dogs to leap to their death.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

A 30-acre garden inspired by the principles of modern physics.

The hidden lair of an alchemist rediscovered in a 2002 flood.

The oldest operating pharmacy in the world features 800-year-old recipes.