Built by a freemason (actually a rosicrucian - same shit, different name), it features the biggest initiation well in existence. This 27 meters (88 foot for you all metric hating kiwis) deep well is located on the land of Quinta da Regaleira. Located near the historic center of Sintra, Portugal lies the Quinta da Regaleira- a spectacular estate that sits in a World Heritage protected landscape. While thousands of tourists flock to the castle every year to admire the unique architecture of the Quinta de Regaleira that combines Gothic, Egyptian, Moorish and Renaissance features, one of its most fascinating features is located beneath the ground – a pair of wells spiraling deep within the earth. The wells were never used, nor intended for water collection. Instead, these mysterious underground towers were used for secretive initiation rites.