London's amazing modernist public square that never was.

The last four extravagant street signs of London's historic banking street.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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 celebrated bandstand at the center of what was once the worst slum in London.

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

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

Pivotal home of Nobel Prize winner Pablo Neruda.

Built for the 1962 World Cup, this fully functioning botanical clock is still ticking.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

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

The first mosque in the world to receive electricity.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Psychedelic murals coat the inside of a nondescript research library.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

This 47-story "M" needed 20 years to be completed

A museum in the former home of Marxist revolutionary Leon Trotsky.

66,000 pieces of art, donated by one of the world's richest men.

Part bookstore, part café, and part forest.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The only castle in North America to ever house European sovereigns.