There's an exclusive Beefeaters pub hidden in the Tower of London.

These morbid carvings remind churchgoers of the inevitability of death.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

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

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

This luxury shopping lane has been protected by its own tiny police force for over a century.

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

Pop culture has helped to keep this iconic British building from being destroyed.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

The monster at the center of the Darwin Center Spirit Collection.

A historic arboretum and non-conformist, non-denominational park cemetery.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Repository for more than 22 million pickled specimens.

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

A network of concealed passageways lies within a busy London Underground station.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

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

A cluttered and astounding collection of antiquities and curiosities.

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

The remains of Crystal Palace Great Exhibition of 1851.