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

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Rebuilt remains of a temple to Roman god Mithras.

In an arboretum with hundreds of memorials to the fallen, this one might be the most poignant.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

The television series' iconic giant foot was borrowed from this classical painting.

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

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

One of the world's largest collections of pathological specimens.

The curios of pharmacist and collector Henry Wellcome.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

6000-year-old site covered in more than 50 megaliths.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

This amazing 15th-century mural remained hidden in plain sight for centuries.

Abstract dinosaur models in London.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

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

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.