Hidden beneath the streets of London is a secret subway that only carried mail.

The anatomical-pathological collection of a man who changed surgery.

Pop culture has helped to keep this iconic British building from being destroyed.

This hidden green space is the city's second largest conservatory.

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

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

This English medieval castle is where King John died of dysentery.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

A seaside town with no sea in sight.

A collection of early 19th century trams set in a reconstructed period village.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

Eighty million natural history specimens call this gargantuan museum home.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

In this medieval fish bowl, the carp weren't pets.

The undercroft is a spectacular example of medieval Cistercian architecture.

The ancestral home of beloved English poet Lord Byron has a bizarre history.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

When the public was consulted about a new piece of street art, they naturally asked for an enormous metal dragon.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

The oldest inn in England served brew to the crusaders.

The largest greenhouse in the world is home to over one million types of plants.