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

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

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

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

A lush indoor jungle fills this bustling Madrid transportation hub.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

The unfinished final resting place of some of Spain's most prominent politicians.

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

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

An old, deep well, connected with a miraculous, divine rescue and the patron saint of Madrid.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

This small museum tucked within a subway station holds pieces from Madrid's past.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

Infamous and now demolished panopticon prison built by its former inhabitants.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.