The cutest way to stay safe in traffic.

Atop this former dutch railway office sits an interstellar work of art.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

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

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

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

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

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

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.

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

This wooden mosque is one of the few remnants of medieval Poland's Muslim Tatar community in this deeply Catholic country.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

Boats must transform into railroad cars to navigate this Polish canal.

The giant metal fruit was once the symbol of a large farm.

This antique thermometer honors the creator of the first universal temperature scale.

The Suurhusen church tower in Germany leans over farther than the famous Leaning Tower of Pisa.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

Cockatoo Island is a Heritage-listed island in the middle of Sydney Harbour.

A special train service transported Sydney's dead from this station to "Necropolis Receiving Houses" at Rookwood Cemetery.

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

This historic observatory contains the world's oldest refracting lens telescope.