One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

A 125-meter long "tribute to the Brazilian people."

Site full of incredible prehistoric paintings and archeological findings.

The largest library in Latin America owes its existence to an Old World earthquake and a Napoleonic invasion.

The remains of a British railway rusting in the jungle mist of a Brazilian mountainside.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

These termites have an large and deadly abode—impressive by day, dazzling by night.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

Artists and musicians now rule over this former rail station.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Banksy gives themself artistic license with this piece of London street art.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.