Sintra has several unique places to visit and Quinta da Regaleira is one of them. It was named after the Viscountess da Regaleira, who bought the estate in 1840 to use as a summer retreat. When António Monteiro purchased it in 1893, he added adjacent plots of land, and hired the Italian architect Luigi Manini, who added Manueline, Roman, Renaissance and Gothic architectural features to the 4 hectares of Quinta da Regaleira, completing the project in 1911. It remained in private ownership until 1997, when the Municipality of Sintra bought the estate, and after extensive renovations, opened it to the public in June 1998. This site is included in the Cultural Landscape of Sintra classification as a World Heritage site by UNESCO.
The Regaleira Palace has five floors, but only had a couple of rooms on the ground floor were open, as the rest of the palace was being renovated when I visited.
The paths, above ground, weave around the extensive gardens, leading one to water features, wells, and castle like structures. There are underground tunnels leading to grottos, caves, and to the Initiation Well.
The Initiation Well is 27 meters deep, walk down the stone steps to the well floor and there are tunnels that lead to other parts of the gardens.