A photo from open sources
Under Washington in the USA, a huge network of volcanic caves, several kilometers long, lying at a depth hundreds of meters below the surface of the earth. Impressive caves, staggering kaleidoscope of colors. Geologists believe that they formed more 8000 years ago from the flows of lava, which waves ran one layer to the other, when it flowed through a huge canyon and gradually froze. A photo from open sources Фотоиз открытых источников Фотоиз открытых источников Фотоиз открытых источников Фотоиз открытых источников Фотоиз открытых источников Фотоиз открытых источников Фотоиз открытых источников Фотоиз открытых источников
Caves