This foreboding medieval castle was twice besieged by barons rebelling against the English king.

The last resting place of the famous Native American princess is marked by a haunting monument.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

The much-beloved mascot of a local museum.

The curious and tiny collection contains some very odd objects.

A monument to the real explorer and bear who inspired characters in Philip Pullman's 'His Dark Materials.'

The arching stretch of London's longest street holds many reminders of the area's maritime past.

Crafted by one of the first makers of stoneware in England.

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

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

The canine-themed book collection claims to be Europe's largest dog library.

The world's oldest optical museum is an odd collection where the exhibits look at you.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

A replica of the famed statue far from home.

Near the site where the English Archbishop was born, you can find an emblem in the shape of a pilgrim's badge.

A recreation of a sign that Charles Dickens used to see on his walk home.

This building contains a door only used by members of the royal family.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

Metal horses galloping through a London fountain provide a link to the city's past.