The commemorative stone column conceals a secret laboratory.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Cliffs full of fossils at the portal to England's Jurassic Coast.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

This secluded walkway overlooks a magnificently wild London green space.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

Famously misunderstood wonder of the ancient world

The world's largest collection of witchcraft regalia.

The sign at the garden gate reads: "These Plants Can Kill."

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Asthmatic Charles Hyett's son built a fantastical garden for his father to convalesce in, alas it was too late.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

The view that inspired the scenes of Dracula's first landing in England.

Regency-era excess on the English Coast.

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

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

A mysterious bridge over a sunken Roman road.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.