The existence of a lava tube is sometimes revealed by the presence of a ‘skylight’ in which the roof of the tube has ...
After this lava delta collapsed, new lava spewed from the tube like a fire hose into the ocean 60 feet below. This story appears in the June 2017 issue of National Geographic magazine. Veteran ...
Just north of the Deschutes County Fairgrounds, the Redmond Caves, a series of five caves administered by the Bureau of Land ...