The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This sculpture pays homage to the street sweepers of Madrid since its inauguration in 2001 in Plaza Jacinto Benavente.

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

This pedestrian footbridge honors Pero Jones, an enslaved African who lived in Bristol.

An homage to the first Spanish cyclist to win the Tour de France.

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

Five million people are laid to rest here, more than the population of Madrid itself.

One of the best examples of the modernist movement in Madrid.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

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

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

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

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

A medieval cave used to shelter local hermits now holds nearly 200 old Quaker gravestones.

The unpredictability of this pendulum's movements has drawn visitors to this magnificent church for decades.

An alchemical monument that represents "Earth, Air, Fire, and Water."

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

A 142-foot-tall Q-tip on Bristol's skyline.

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

The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

The Bristol Camera Obscura housed in an ancient windmill.