Commonly acknowledged as the only public monument to the Devil himself.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Europe's largest dinosaur museum was founded by a passionate autodidact.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

A Swiss board game museum housed inside a picture-perfect castle.