Fort Rock
Fort Rock is a tuff ring located on an ice age lake bed in north Lake County , Oregon , United States . 
<triplet> Fort Rock <subj> Lake County <obj> located in the administrative territorial entity <triplet> Lake County <subj> Oregon <obj> located in the administrative territorial entity <subj> United States <obj> country <triplet> Oregon <subj> Lake County <obj> contains administrative territorial entity <subj> United States <obj> country <triplet> United States <subj> Oregon <obj> contains administrative territorial entity