Inside this unique festival hall, a slide leads guests down to a subterranean watering hole.

Britain's only herd of free-ranging reindeer.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

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

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

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

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

360° views of the city plus five floors of optical illusions and hands-on science.

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

This Stockholm light tower can be controlled by anyone with a smartphone.

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

Notorious artist squat renovated into legal studios.

The video game-themed street art first popped up in the French city.

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

This outdoor library provides around-the-clock access to around 7,000 books.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

The celebrated eyesore created by starry-eyed sweethearts.

This Parisian gem is one of the most incredible ethnographic museums in the world.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.