The Night Blooming Cereus, although they can be found in warmer climates all over the world, is native to Southwestern North America. Today, Tohono Chul Park, located in Northwest Tucson, is home to the world's largest collection of these cacti. Every year, people wait anxiously and patiently for Bloom Night, when all of the park's cacti reveal their blooms. Pima Prickly Park on River Road also contains a significant collection. Additionally, the Night Blooming Cereus can be naturally found in sandy soils, on the banks of washes, or on hill slopes; shaded by desert shrubs or by trees. Each cluster of cacti blooms simultaneously. Blooms at different locations will most likely happen on different nights, so be sure to pay attention to the update system for the particular location you're planning on going to.