Quinta da Regaleira consists of a romantic palace and chapel, and a luxurious park featuring lakes, grottoes, wells, benches, fountains, and a vast array of exquisite constructions. The palace is also known as "Palace of Monteiro the Millionaire", from the nickname of its first owner, António Augusto Carvalho Monteiro.

Monteiro wished to build a bewildering place where he could gather symbols that would reflect his interests and ideologies. With the assistance of the Italian architect Luigi Manini, he designed the 4-hectare estate with its enigmatic buildings, believed to hide symbols related to alchemy, Masonry, the Knights Templar, and the Rosicrucians. The architecture of the estate evokes Roman, Gothic, Renaissance and Manueline architectural styles. The construction of the current estate commenced in 1904 and most of it was concluded by 1910. (wikipedia)