A giant floating rubber duck-bunny painted with a different design every year.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

This iconic building was founded as a school for the impoverished, but became one for the sons of the local gentry.

The longest and steepest staircase locks in the United Kingdom.

Hundreds of huge, centuries-old horseshoes adorn the walls of this nontraditional 12th-century castle.

A locomotive that was captured as a prisoner of war is now recognized as a WWII memorial.

This former sewage pumping station is now a fascinating museum.

Stonehenge has nothing on Castlerigg’s views.

This unusual sculpture is sometimes partially, sometimes fully, submerged.

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

Murals of the wild parties once held on the frozen River Thames.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

A totem pole of heads to represent the different stages of life.

A friendly pub with a sordid past in cock fighting.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

This inn of the court provides a fascinating window into London’s legal and architectural history.

Behind one of the world's most impenetrable vaults is a massive collection of retail silver.

This pub has roots dating back to 1430.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

A memorial for public executions that dates back to the 14th century.

The medieval woodcut-style artwork chronicles life in medieval London.