Sebastian and Pritricia has an enormous garden in Chilecito, La Rioja Province, Argentina.
It continues up in the wild, where there are lots of cacti. I visited in 2003 (and 2013).

Most of the garden is new, it will be awesome when it settles!
Not many caudiciforms, but still very interesting!

They have a small shop out side there house. I found a couple of caudiciforms I didn't have.