The Tudor-style cottage in the middle of the square is not quite what it seems.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

This luxury shopping lane has been protected by its own tiny police force for over a century.

This London plaque marks the spot where David Bowie's famous alien made his debut.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

Former drug lord’s manor, now a theme park. Watch out for the hippos.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

The (usually) serene burial place of the world's most notorious drug lord.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

A museum of memories in what was once one of the most violent cities in the world.

Once a palace for the Archbishop of York, these 15th-century ruins now serve as a haunt for history buffs.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

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

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

A working farm turned into a museum dedicated to the world's most unbelievably tiny cars.