This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome outdoor black and white Yellowstone National Park Hot Springs and Geysers. Crater of the Giantess Geyser. It has large deep orifice by feet in diameter and when empty showing