The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A jumble of concrete on the corner of one of London’s terraced buildings is actually a work of art.

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

A legend says that if this elaborately decorated glass breaks, the good fortune of its owner's household will also disappear.

The arching stretch of London's longest street holds many reminders of the area's maritime past.

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 almost 1,000 years old, this is the oldest known door in all of Britain.

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

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.

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

London's first edible insect farm offers facility tours and cooking classes.

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.

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

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

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.

There's an exclusive Beefeaters pub hidden in the Tower of London.

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

Pop culture has helped to keep this iconic British building from being destroyed.

The monster at the center of the Darwin Center Spirit Collection.

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.