truetrue This image is a derivative work of the following images: File:Opal_Pool_YNP2.jpg licensed with Cc-by-sa-3.0 2011-02-03T03:42:51Z Acroterion 3688x2370...
truetrue English Opal Pool, with Twin Buttes beyond, in the Midway Geyser Basin, Yellowstone National Park, Wyoming, USA. French Opal Pool, avec les Twin...
