Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

This toxic spoil heap found a second life as a ski slope, popular film location, and wildlife haven.

The cedar tree in Highgate Cemetery earned its title by accident.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

A famous burial ground with a history both grim and literary.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Pop culture has helped to keep this iconic British building from being destroyed.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Catacombs turned marketplace.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Banksy gives themself artistic license with this piece of London street art.

A historic house left in "dramatic still life."

Rebuilt remains of a temple to Roman god Mithras.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The record holder for the world’s largest peach.