A masterpiece of Art Deco architecture hidden in plain sight in West London.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

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

The bones of two medieval royal lions were discovered at the historic fortress.

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

This ancient Egyptian obelisk still bears the wounds of World War I.

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

An architectural oddity hides in plain sight on this iconic London bridge.

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

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

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

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This restaurant's specialty is "a major enigma for food historians."

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Time stands still at this serene burial ground in the center of Budapest.