This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

The last four extravagant street signs of London's historic banking street.

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

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

A memorial to a dog that inspired rioting in the streets of London.

A quiet memorial to those who died saving others in the heart of the City of London.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

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

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

Ship-sized kinetic sculptural fantasy.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

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

This 1920s Dutch barge is now a floating bookstore.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

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

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

A network of concealed passageways lies within a busy London Underground station.

This enormous, elaborate tomb looks oddly out of place next to a suburban Edinburgh bowling club.

This mundane post marks the old location of the city's main postal hub.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.