A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Elevated freight railway turned wildly successful urban park.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

Abstract dinosaur models in London.

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

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Dictionary Johnson’s favorite feline.

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

A student driver's nightmare.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The remains of Crystal Palace Great Exhibition of 1851.

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

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

London's smallest police station is barely the size of a phone booth.

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

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

One part local history, 99 parts gruesome haunted house.

The curios of pharmacist and collector Henry Wellcome.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

An unusual round church in London with a Templar past.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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