A spiral staircase twists to the top of this unusual Czech lookout tower.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

A giant interactive periodic table with real samples of the elements.

The taxidermied remains of a once-great parrot.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

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

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

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.

Dictionary Johnson’s favorite feline.

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

Catacombs turned marketplace.

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

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

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

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.