Tovrea Castle is a historic structure and landmark in PHOENIX Arizona. Originally intended as a centerpiece for a resort and later a private residence, the castle is now part of the Phoenix parks system. Carraro Cactus Garden shows over 5,000 individual cacti in over 100 different varieties, all maintained by volunteers of the Tovrea Carraro Society. It's quite a site to see every time we go to the Phoenix zoo or the Desert Botanical Gardens