This innovative steam machine was no doubt the most famous of the pioneer locomotives.

An architectural oddity hides in plain sight on this iconic London bridge.

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

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

Ship-sized kinetic sculptural fantasy.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

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

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

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

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

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

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

The whiskey producer's archives includes a historical list of infractions committed by and associated penalties exacted upon employees.

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

This beautiful site is where the first transatlantic telegraph was sent from.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

An oddly conical beacon perched atop beautiful Irish cliffs.

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.