This 1920s Dutch barge is now a floating bookstore.

This open-air sculpture museum is located under a bridge in the center of Madrid.

This lucky bronze frog was gifted to Madrid by a casino.

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

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

Once a resting spot for King Fernando VII.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

A haven for book enthusiasts across the street from Retiro Park.

A lush indoor jungle fills this bustling Madrid transportation hub.

A pair of gigantic baby heads greet passengers at Atocha Station.

This dragon narrowly escaped demolition.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

A much-loved local landmark pays tribute to the shipbuilding past of this area.

Metal horses galloping through a London fountain provide a link to the city's past.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This bookstore serves recipes from the cookbooks on sale.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

This pub boasts a curious history and may have inspired a Dickens character.

The pockmarks across the building's facade are remnants of the Blitz.