An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

Where Agatha Christie mysteriously disappeared in 1926.

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

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A 600-year-old mini shrine guarded by a sword-wielding knight hides in a crumbling cliff face.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This inconspicuous pharmacy went down in history as the first gas station in the world after fueling the first road trip ever taken.

This unusual small wind turbine in Germany has only a single rotor blade.

A former ironworks that was the first UNESCO industrial site.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

This ghost town in Belgium will lose its street art when it ceases to exist.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Seat of the Duke and Duchess of Devonshire for centuries.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

142 ceramic steps become a mosaic once a year.

Every inch of this chapel is covered in craftsmanship from across the world.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.