It's hard to believe this waterfall is in the middle of the desert, on top of the fact that it's vividly blue! Havasupai is a Native American Reserve located in Arizona, where permits are required to enter. Every year, campers attempt to book a limited number of spots and thousands are unsucessful.. it's a popular place! If Havasupai is on your bucket list make sure you've got your alarms set for booking day in early February.