United States of America
Mount Sylvania is an extinct volcano, part of the Boring Lava Field, on the outskirts of Portland, Oregon. Parts of the mountain are within the cities of Portland, Lake Oswego, and Tigard. The Sylvania campus of Portland Community College is located on the mountain's western slopes.
Listen to the audio guide for Mount Sylvania Free on WIP — starts by itself when you arrive, even with the screen off