Zervreilasee
Zervreilasee is a reservoir located south-west of Vals in the canton of Graubünden , Switzerland . 
<triplet> Zervreilasee <subj> Graubünden <obj> located in the administrative territorial entity <subj> Switzerland <obj> basin country <triplet> Vals <subj> Graubünden <obj> located in the administrative territorial entity <subj> Switzerland <obj> country <triplet> Graubünden <subj> Switzerland <obj> country <triplet> Switzerland <subj> Graubünden <obj> contains administrative territorial entity