Hoodoo formation in the Pink Cliffs, a series of highly-dissected cliffs approximately 35 mi (56 km) long, in Bryce Canyon National Park, Utah, United States. Geologically, the cliffs are pink- and red-colored Claron Formation limestones, forming the upper riser of the Grand Staircase which descends southward to the Grand Canyon in Arizona.Photo credit: Luca Galuzzi