A quiet memorial to those who died saving others in the heart of the City of London.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

Charles Babbage's proto-computer, painstakingly brought to life.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

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

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

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

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

One part local history, 99 parts gruesome haunted house.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

This cemetery features modernist statues as strange as its name.

The taxidermied remains of a once-great parrot.

Collection dedicated to brands, packaging and advertising.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

A memorial to a dog that inspired rioting in the streets of London.

Eighty million natural history specimens call this gargantuan museum home.

Repository for more than 22 million pickled specimens.