This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

A monolithic monument in Greater London.

These morbid carvings remind churchgoers of the inevitability of death.

Where condemned pirates met their grisly end at the gallows on the River Thames.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

A unique tribute to the millions of animals who served and died for the British military.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

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

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

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

This secluded walkway overlooks a magnificently wild London green space.

On October 17, 1814, a 15-ft. wave of beer ran rampant through 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."

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

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

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

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."

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

This home on a quiet suburban street is completely covered with vibrant mosaics.

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

Eclectic final resting place of the controversial explorer.

A famous burial ground with a history both grim and literary.