The cactus was first named in 1890 and is native to South America. It seems it adapts very well to the Mediterranean climate with very dry summers. I am not sure how old it is, but surely should be pretty much for its height.
The flowers open at night and lasts 24 hours, I missed the first one, but was lucky to be able to capture the second and enjoy its beauty.
The anecdote is that there some guests enjoying also the flower!