Colorado Plateau
Among its 18 national monuments are Bears Ears , Rainbow Bridge , Dinosaur , Hovenweep , Wupatki , Sunset Crater Volcano , Grand Staircase-Escalante , Natural Bridges , Canyons of the Ancients , Chaco Culture National Historical Park and the Colorado National Monument . 
<triplet> Bears Ears <subj> national monuments <obj> instance of <triplet> Rainbow Bridge <subj> national monuments <obj> instance of <triplet> Dinosaur <subj> national monuments <obj> instance of <triplet> Hovenweep <subj> national monuments <obj> instance of <triplet> Wupatki <subj> national monuments <obj> instance of <triplet> Grand Staircase-Escalante <subj> national monuments <obj> instance of <triplet> Natural Bridges <subj> national monuments <obj> instance of <triplet> Canyons of the Ancients <subj> national monuments <obj> instance of <triplet> Colorado National Monument <subj> national monuments <obj> instance of