#1 The canyon glows orange as people visit Mather Point, a rock outcropping that juts into Grand Canyon

Grand Canyon National Park

AZ · 4.9M visitors/yr

Moderate Crowds

The Colorado River carved through two billion years of rock to create a chasm one mile deep and 277 miles long at the South Rim.

#2 Saguaro flowers

Saguaro National Park

AZ · 946K visitors/yr

Very Crowded

Giant saguaros, some 200 years old and 40 feet tall, frame both sides of Tucson in the densest stands of these iconic cacti anywhere.

#3 Sunlit Painted Desert hills of the Petrified Forest National Wilderness Area

Petrified Forest National Park

AZ · 559K visitors/yr

Moderate Crowds

Twenty-eight miles of road through technicolor badlands where 225-million-year-old trees turned to stone sprawl wider than cars.