The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

England's most famous front door has an accidental doppelganger.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This small memorial honors a ferocious feline and local hero.

One of the world's tallest statues is also one of its most hated.

Former headquarters of the KGB.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Overlooking the seaside town of Margate stands a tribute to an artist's lover.

Grotto replete with mystical designs laid out in glued shell mosaics.

Flying high, this unusual hornet statue celebrates the local soccer team formerly owned by Elton John.

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

One of the oldest remaining Catholic churches in England is home to the hand of a 7th-century saint.

These remnants of Old London Bridge possess unique acoustics that allow for whispered conversations to carry from one side to the other.

A Victorian synagogue-turned-museum chronicles centuries of Jewish life.

Constructed for defense, this fort oversaw the dress rehearsal for one of the largest invasions in history.

Macabre astrological automaton clock dating to the late 1400s.

This bridge was constructed from the rubble of the infamous Bastille.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.