Bryce Canyon National Park in Utah is not really a canyon, but is 14 huge amphitheaters with spires, pinnacles, windows, and arches.
The Virgin River formed rock into cliffs and towers and created beautiful Zion National Park.
Capitol Reef National Park in Utah surrounds a wrinkle in the earth called the Waterpocket Fold, with layers of sandstone, canyons and rock formations.
Arches National Park in Utah has over 2,000 arches, towering spires, pinnacles, and balanced rocks.
Canyonlands National Park in Utah is in the high desert and has canyons, mesas, buttes, fins, arches, and spires.