Like some of the more famous parks ... Lassen Peak is one of the largest plug dome volcanoes in the world, and its most recent violent eruptions from 1914 to 1917, photographed by B.F. Loomis, ...

Tucked away in far northeastern California, Lassen offers sweeping grandeur and hydrothermal ... naturally dark skies. The park's namesake peak is the one of the largest plug dome volcanoes in the ...

try Lassen Peak. Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.