The Art Deco artwork depicts gilded carriers of deadly illnesses.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

The remains of Crystal Palace Great Exhibition of 1851.

A relic of Victorian grandeur hides beneath a busy South London road.

This Victorian marvel of engineering and artistic prowess is nicknamed the "Cathedral of Steam."

A labyrinthine underworld of tunnels and caverns hides beneath the city.

The oldest inn in England served brew to the crusaders.

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

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.

This may be the last of London's wooden pavements, which were once a common sight in the city.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

This hidden green space is the city's second largest conservatory.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

An unusual round church in London with a Templar past.

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

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

This emotive sculpture was originally created for the 1878 World's Fair.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

A surrealist timepiece by the artist of melting clocks.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

One of the world's smallest functioning lighthouse boasts an unexpected connection.

A abandoned hostel which was once home to Brunei's brightest students and present-day politicians.