A home for Spain's version of the Tooth Fairy, hidden in an old gas company register.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

This historic fountain is a favorite neighborhood meeting point.

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

King Carlos IV laid the first stone during construction of this chapel.

Inaugurated three times, this tower offers some of the best views of Madrid.

A statue commemorating a beloved stray dog who was adopted by the entire neighborhood where he lived.

Strange masks and obscure costumes are housed in this old Madrid corrala.

This postmodern apartment block was designed to be a vertical neighborhood.

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

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

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

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Baltasar Bachero became a hero after he saved the lives of two children nearly run over by an out-of-control mule-drawn carriage.

This 40-meter waterfall of light graces one of the most iconic stations in the Madrid metro network.

This cuddly-looking statue symbolizes the bond between Spain and China.

In this 400-year-old hotel in Madrid, you'll find a comb in every room, an old clock, and maybe a ghost.

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Remains of the lost church hide beneath this Spanish Parliament building.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.