Saguaro National Park offers great opportunities for sunset watching. NPS photo/J. Williams. Saguaro National Park is located within a desert, but contrary to what you might expect, there is an abundance of life. Plants here are adapted to drought, so during long dry periods they are able to go dormant, conserving their water. At these times, many plants appear lifeless, but shortly after a rainfall these plants are able to come to life sprouting new green leaves. If you like green, you will especially enjoy Saguaro National Park during the rainy seasons. Within just 48 hours after a rainfall, the ocotillo plant is able to change from what appeared to be a handful of dead sticks into a cheerful shrub with tall green branches, covered in new leaves.