Cactus Species of the American Southwest (Complete Guide)
Desert Plants - Deserts Australia
At Cactus Country, Australia's Largest Explorable Cacti Collection Will Transport You Across Continents
Cactus Country - A hidden 'desert' in the countryside: How you can explore a little-known CACTUS farm three hours' drive from a major Australian city. Holiday-starved Australians yearning for exotic adventure are
Saguaro Cactus Fact Sheet
Saguaro National Park: Walking in the Land of Giant Cacti - WanderWisdom