A public center dedicated to showcasing and conserving the enormous shaggy Poitou donkey.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The world's largest wooden structure.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Wonderland replication in progress by one persistent man.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A temple to modernity, tucked away amid Barcelona's more well known museums.

Bacteria and algae give the salty water its bubblegum hue.

This unfinished tribute to a hometown hero and early baseball great is now an abandoned roadside attraction.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

Home to drunken tower-climbing goats... seriously.

Walk the whole Mississippi River!

Detroit’s downtown castle is one of the oldest structures in the city.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

A roadside shrine to a late rock god only remains thanks to the unyielding efforts of his fans.

Historic cuisine meets fine dining in a hotel-restaurant overlooking Hyde Park.