London's smallest police station is barely the size of a phone booth.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

This tiny alleyway is now a shrine to a subculture riot between the mods and rockers.

Regency-era excess on the English Coast.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A hands-off space for graffiti artists to hone and display their skills.

The fairy tale castle of the "fairy-tale king."

Enter the cabin of a life-sized Hindenburg replica.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

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

This sculpture encompasses the emotion of rail travel.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

Stockholm's narrowest alley is barely over two feet wide.

The official meeting point for the oddly named governing assembly of ancient Sweden.

A small church in Uppsala hides the grave of a renowned 18th-century astronomer.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Ancient burial grounds of the wealthy.

A musical instrument played by the sea.

The prototype for all Nazi concentration camps.