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

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

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

Repository for more than 22 million pickled specimens.

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

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

The largest of London's subterranean rivers and once a mad, bad center of London life.

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.

A little slice of Japan and its aesthetics in London's Holland Park.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

A historic house left in "dramatic still life."

The curios of pharmacist and collector Henry Wellcome.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A tongue-in-cheek arcade where the games are based on everyday life.

A winding cave grotto walkway built to provide employment for veterans after World War I.

This ancient Bedfordshire church was abandoned when the village's population slowly began migrating to new towns.

A 19th century grave house with a unique message formed by the stone supports to the railing around the walls.