United States: Oregon: Sisters: South Sister
South Sister 10,363 feet (3,159 m) Stratovolcano uneroded summit crater contains Teardrop Pool - crater lake, highest lake in Oregon Middle Sister 10,047 feet (3,062 m) Stratovolcano North Sister 10,085 feet (3,074 m) Shield Volcano en.wikipedia.org
Three Sisters
Photo of South Sister by