Where Venice's gondolas go for a tune-up.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Famously misunderstood wonder of the ancient world

Murals of the wild parties once held on the frozen River Thames.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

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

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

A roadside shrine to a late rock god only remains thanks to the unyielding efforts of his fans.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

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

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

Public access to clean drinking water was an instant hit among the masses.

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

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

Hear the quietest sound from across the dome.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Two stunning 17th-century libraries and a cabinet of curiosities.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.