The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The Uros people live on floating reed islands in lake Titicaca.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A Biblically notable site over the ruins of an ancient city that is now a protected World Heritage site.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

The most loyal of little dogs, or a Victorian era publicity stunt?

Protecting the dead from opportunistic body snatchers.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

Famously misunderstood wonder of the ancient world

The oldest working mechanical clock in the world.

Giant, friendly pelicans in Central London, the most unlikely of places.

An unusual round church in London with a Templar past.

Hear the quietest sound from across the dome.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Berlin's old airport.

Metro station with a claim to rock n' roll fame.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The most visited, and possibly most controversial, museum in Germany.

A little sculpture with a large wardrobe.