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

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

Ship-sized kinetic sculptural fantasy.

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

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

An ornate and disused early 20th-century building has been given new life as a fully operational structure, complete with offices, oyster bar, and a furniture retailer.

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

The taxidermied remains of a once-great parrot.

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

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

Scattered throughout London are ancient remnants of the city's former bounding wall.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The ruins of a once-mighty medieval palace are hidden away in otherwise modern London

The (fictional) address of Sweeney Todd's bloody barbershop.

This 500-meter-long memorial pays tribute to the hundreds of thousands of lives lost to COVID-19 in the UK.

These stained-glass windows are all that remains of a building that was the target of one of the biggest explosions in London after World War II.

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.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

The bronze uniforms commemorate the vital role of women during World War II.

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

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

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.