A fantastic castle rumored to be the birthplace of King Arthur.

The oldest working mechanical clock in the world.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The ritual has been performed uninterrupted for nearly 700 years.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The commemorative stone column conceals a secret laboratory.

Hear the quietest sound from across the dome.

This ancient Egyptian obelisk still bears the wounds of World War I.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

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

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

Taihape's claim to fame is a fictional Kiwi farmer wearing gumboots.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

A Maori village obliterated by an 1886 volcanic eruption.

The once and future home of New Zealand's famed Pink and White Terraces.

Deadly scalding and one of the largest hot springs in the world.

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

The "punniest place on Earth” has nearly as many bull-themed puns as it does people.

New Zealand's only running funicular railway.