The remains of Crystal Palace Great Exhibition of 1851.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

London's largest outsider art museum.

Eighty million natural history specimens call this gargantuan museum home.

Catacombs turned marketplace.

London's old-school healing garden.

The final resting place to 300 Victorian-era pets hides inside the city park.

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

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

Ship-sized kinetic sculptural fantasy.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

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

This South London cemetery holds the remains of more than 15,000 people.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

An unusual round church in London with a Templar past.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

One part local history, 99 parts gruesome haunted house.