. ▁Maria . ▁ ▁The ▁largest ▁part ▁of ▁the ▁valley ▁is ▁part ▁of ▁the ▁Swiss ▁canton ▁of ▁Gra ub ünd en . ▁A ▁small ▁part ▁lies ▁within ▁the ▁Italian ▁province ▁of ▁South ▁Ty rol . ▁The ▁border ▁is ▁located ▁at ▁approximately ▁ 1 2 4 5 ▁meter ▁between ▁M üst air ▁( 1 2 4 7 ▁meter ) ▁and ▁T auf ers ▁im ▁Mün st ert al ▁( 1 2 4 0 ▁meter ). ▁ ▁The ▁river ▁in ▁the ▁valley ▁is ▁the ▁Rom ▁( Il ▁Rom ▁or ▁R omb ach ). ▁ ▁N aming ▁convention ▁ ▁Con tr ary ▁to ▁the ▁common ▁notion , ▁where ▁the ▁beginning ▁of ▁a ▁valley ▁is ▁referred ▁as ▁the ▁" upper ▁valley " ▁and ▁the ▁end ▁as ▁the ▁" lower ▁valley ", ▁in ▁Val ▁M üst air ▁these ▁are ▁referred ▁to ▁as ▁" inner " ▁and ▁" outer " ▁respectively . ▁This ▁is ▁often ▁reflected ▁in ▁location ▁names . ▁ ▁For ▁instance , ▁the ▁valley ▁is ▁tradition ally ▁divided ▁into ▁three ▁third s : ▁ ▁Ter z al ▁d ' A int ▁( inner ▁third ) ▁with ▁Tsch ier v , ▁Ful der a ▁and ▁Lü ▁ ▁Ter z al ▁d ' Im mez ▁( middle ▁third ) ▁with ▁Val ch ava ▁and ▁Sta . ▁Maria ▁ ▁Ter z al ▁d ' O ura ▁( outer ▁third ) ▁with ▁M üst air ▁Inc ident ally , ▁this ▁division ▁corresponds ▁to ▁the ▁first ▁three ▁plate aus ▁occurr ing ▁on ▁the ▁Swiss ▁part ▁of ▁the ▁valley . ▁ ▁Language ▁The