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

The bronze uniforms commemorate the vital role of women during World War II.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

The television series' iconic giant foot was borrowed from this classical painting.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

An eerie former warehouse turned cistern turned movie set.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

This stucco building in North Africa was the first American-owned property on foreign soil.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

The world's most elegant power lines.

This cemetery features modernist statues as strange as its name.

A completely underwater art museum sends a stark message about humans' impact on the environment.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

The unexpectedly beloved remnants of a controversial thermal power plant.

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

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.

Mountain where Jesus was first tempted by the Devil.

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.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol. 

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.