This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Bacteria and algae give the salty water its bubblegum hue.

Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

A French artist's vague warning hangs over Belleville.

The final resting place of many of Germany's most famous communists.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

A Gothic-style abode built to accommodate the church's three resident peacocks.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

A meow-velous tribute to a beloved street cat, made famous on the internet.

Crawl through the hole in the middle of this stone to break off a bad relationship or initiate a good one.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The last four extravagant street signs of London's historic banking street.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

A library where thousands of books explain how to avoid another Great Recession.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.