This macabre painting of a Shakespearean scene looks like something out of a nightmare.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

This knockout museum lies in a sleepy corner of London.

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

A Roman spa buried deep beneath the City of London.

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

An archive of ceramic eggs painted to record clowns' personal makeup designs.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

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

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

This 1920s Dutch barge is now a floating bookstore.

Two plaques commemorate the site of Shakespeare's first theatre.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

Eclectic final resting place of the controversial explorer.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

A clock designed to run with perfect accuracy for 10,000 years.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

One part local history, 99 parts gruesome haunted house.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.