▁Section ▁are ▁the ▁la cc ol ith ic ▁mountains , ▁like ▁the ▁Henry ▁Mountains ▁and ▁the ▁La ▁Sal ▁Mountains . ▁These ▁are ▁struct ural ▁dom es . ▁ ▁The ▁tur bid ▁San ▁Juan ▁River ▁flows ▁into ▁the ▁region ▁from ▁the ▁east , ▁through ▁a ▁deep ▁me and ering ▁g orge , ▁which , ▁with ▁its ▁trib ut aries , ▁dra ins ▁a ▁far - re aching ▁area , ▁including ▁the ▁La ▁Pl ata ▁Mountains , ▁the ▁San ▁Juan ▁Mountains ▁and ▁other ▁less er ▁ranges ▁on ▁the ▁Cont inental ▁Div ide , ▁the ▁Ch us ka ▁Mountains , ▁and ▁enorm ous ▁areas ▁of ▁mes a ▁land ▁in ▁the ▁interior ▁of ▁the ▁bas in . ▁From ▁the ▁Was atch ▁Range ▁and ▁Aqu arius ▁Mountains ▁on ▁the ▁west ▁come ▁other , ▁but ▁less er , ▁s ilt - lad en ▁streams , ▁all ▁car ving ▁the ▁deep , ▁w inding ▁can y ons ▁which ▁have ▁given ▁this ▁country ▁its ▁name ▁and ▁developed ▁a ▁weird ly ▁disse cted ▁landscape . ▁The ▁Colorado ▁River ▁is ▁the ▁largest ▁such ▁stream . ▁ ▁In ▁n ort he astern ▁Arizona ▁is ▁Monument ▁Valley , ▁where ▁sharp ▁sp ires , ▁ob el is ks , ▁and ▁tower - like ▁masses ▁of ▁rock ▁rise ▁hundreds ▁of ▁feet ▁above ▁their ▁surr ound ings . ▁At ▁the ▁eastern ▁margin ▁of ▁the ▁C any on ▁Land s ▁is ▁the ▁M esa ▁Ver de , ▁a ▁huge ▁cu esta ▁that ▁has ▁been ▁deeply ▁disse cted ▁by ▁streams . ▁Here ▁in ▁great ▁re cess es ▁in ▁the ▁can