A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

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

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

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

Rebuilt remains of a temple to Roman god Mithras.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

An unusual round church in London with a Templar past.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

These mansions date back to Chicago's days as a brewer's paradise.