The extra platform at Gloucester Road has been used for art displays for over 25 years.

The Tudor-style cottage in the middle of the square is not quite what it seems.

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

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

It holds a fabulously designed tribute to astronomer Edmond Halley.

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

This coffee shop lies hidden beneath a historic church.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The Great Fire of London and the regulation of one-way streets both started in this alley.

The commemorative stone column conceals a secret laboratory.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

With a history stretching back to the 16th century, this pub has a few stories to tell.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

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

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

An incarceration museum on the spot of possibly the oldest prison in England.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

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

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

A sculpture serving as an homage to Pope John Paul II.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.