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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

These ornate arches show how the course of the River Thames has changed.

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

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

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

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

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

After nearly 60 years, there's still a bear at Paddington Station looking for help.

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

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

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

This luxury shopping lane has been protected by its own tiny police force for over a century.

The real clothing store that inspired a fictional spy organization's front.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

A whimsical, but often overlooked clock in Park Avenue.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.