One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A 200-year-old prison that now houses a peculiar crime museum.

Home to one of the tallest church spires in Europe, this historic church once played host to King Henry VIII and Anne Boleyn.

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

A masterpiece of Art Deco architecture hidden in plain sight in West London.

Each spring this woodland floor is carpeted with purplish flowers as far as the eye can see.

Chemical fertilizer in agriculture's origin story begins here.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

You can climb to the top of the column built to honor the "father of British inland navigation."

A menagerie of curiously bred creatures.

The incredible private taxidermy collection of an eccentric zoologist.

Model aircraft soar over 360-degree views of the countryside at the start of England's oldest road.

This unusual geoglyph was built as a warning so low-flying aircraft wouldn't scare the zoo animals.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

This antique prison is a tourist attraction with a sordid past.

Human-made caves excavated to hide a secret society of wealthy pagans.

Eighty million natural history specimens call this gargantuan museum home.

The world's largest collection of witchcraft regalia.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

Flying high, this unusual hornet statue celebrates the local soccer team formerly owned by Elton John.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

This magical museum celebrates the life and work of a seminal children's book writer (and occasional spy).