A hurricane-stricken oak tree has been reborn as a beautiful chainsaw artwork.

The curiosities and wonders of pharmacy in a delightful historic building.

A monument to the art of slicing people open.

An explosion of natural color known as "the river that ran away from paradise."

A dangling church built over a Colombian gorge.

The Andean town where every single building is decorated with a brightly colored frieze.

This picturesque mansion has gone from opulent ruin to nature museum.

It might look like a doghouse, but this small structure was actually built to house a spirit from Maya mythology.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

France's national museum of scientific and industrial instruments.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

Paris' linguistic guide to the international language of, yes, love.

Notorious artist squat renovated into legal studios.

This massive library holds what was once the largest book collection in the world.

The oldest stone house in Paris was built by its most famous alchemist.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Tiny observatory made big contributions to the study of the Earth's motion.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

The only surviving piece of Copenhagen's 16th-century defensive wall.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.