A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

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

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

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

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

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

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

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.

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

The taxidermied remains of a once-great parrot.

A memorial for public executions that dates back to the 14th century.

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

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

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

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A magnificent Victorian garden that brings the charm and style of old-time aristocracy to the 21st century public.

This medieval castle is filled with an eccentric collection that ranges from ancient Egyptian artifacts to taxidermy to a mummified hand that was cut off during a duel.

Does being buried standing up help you get into heaven faster?

This imprint of an old computer keyboard has a unique backstory.

A 16th-century footpath said to be haunted by a young girl that died trapped within its misshapen old house.