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

France's most famous cemetery, with some of its most curious tombs.

Eighty million natural history specimens call this gargantuan museum home.

Macabre astrological automaton clock dating to the late 1400s.

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

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

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A seaside town with no sea in sight.

A face-like natural rock formation so well known, a pub was named in its honor.

Seat of the Duke and Duchess of Devonshire for centuries.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

This Victorian footbridge over the River Tees was originally built to carry water from the high moorland to the industrial towns on the coast.

This hidden natural fountain issues forth a steady supply of supposedly healing water that tastes like rotten eggs.

This bridge once allowed Dere Street to cross the River Tees.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

The world's oldest railway bridge in continuous use.

A piece of public art commemorating the world's first Black professional footballer.

This building was once a town hall, a fire station, a prison, a dairy market, and the target for two marksmen.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.