Boca do Inferno - Av. Rei Humberto II de Itália, Cascais, Portugal

Boca do Inferno (Mouth of Hell) is a sea cave in close to Cascais. It gets the name from the ocean waves which crash against the rocky cliff and splash out from an opening on the cliff top. It has been an attraction for centuries, but is best known for being the spot where magician, astrologer and occultist Aleister Crowley faked his own death in 1930. The idea was inspired by Greek philosopher Empedocles, who was said to have thrown himself into a volcano. Crowley reappeared three weeks later.