An Antoni Gaudí masterpiece in Astorga.

This beautiful spit of land was once the summer playground of the king of Spain.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

An early 20th-century bullring converted into a modern shopping center.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This fountain was designed to honor the man who helped bring water to Barcelona.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A fantastic Christmas tradition where defecation meets the manger.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The spot where Oxford garnered its name was also home to a medieval philosopher and includes a house covered in statues.

The beams of the New College, Oxford dining hall come with an amazing story.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

This enormous censer uses a pulley system installed over 400 years ago.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Drink wine handed out through a window as part of an age-old tradition.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.