This tree, over 500 years old, was planted by Columbus’s son.

A monument to one of the greatest matadors of all time.

The final resting place of the great navigator, or maybe his brother.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Mysterious texts covered in mystical symbols were found in caves at this site centuries ago.

This bizarrely tree-like red skyscraper is one of the newer additions to Barcelona’s skyline.

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

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.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Engineering ingenuity during the battle of Gibraltar.

Single runway interrupted by a busy road that cuts across its middle.

This modest relic, with rich history as a strategic fort through multiple eras.

This gate served as a small lock-up jail in the 14th century.

The oldest working mechanical clock in the world.

An architectural oddity hides in plain sight on this iconic London bridge.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Giant, friendly pelicans in Central London, the most unlikely of places.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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