Japan’s only surviving winding tower.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

Three bridges straddle a stream, one stacked upon the other.

This sculpture in Valencia features 22,000 tiny, obsidian blue figures that pay homage to the Lady of Elche.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Charles Babbage's proto-computer, painstakingly brought to life.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A clock designed to run with perfect accuracy for 10,000 years.

A train ride to the middle of nowhere gives its passengers some of the most iconic views of Japan's seasons.

This garden located inside a bamboo forest once belonged to a famous Japanese actor.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

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

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

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

One of the largest refracting telescopes in the world, and the first built specifically for studying astrophysics.

Lumps of significant stone from around the world surround a flaming monument for peace.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

A modern-day Lascaux cave underneath Paris.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This Parisian café sticks almost exclusively to an ethos of reuse.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

This building’s ghostly exterior reflects its former lives as a prison, school, and funeral home.

The great Danube river starts here.