In my youth, in the seventies, we had a small greenhouse in our garden. Together with my brother we grew cactuses in it. We were fascinated by the sturdy forms and magnificent flowers. The cactuses in the greenhouse went away, but the interest in cactuses stayed. This summer we had the opportunity to visit the cactus oase in Ruurlo, the Netherlands. A lot of large cactuses, grown in a large greenhouse for several decades. The patterns fascinated me and resulted in this gallery.