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Opal Pool in Yellowstone DyeClan.com - panoramio.jpg - Panoramio upload bot

Excelsior Geyser (30 August 2011) 25 (14484921342).jpg - Ser Amantio di Nicolao

Excelsior Geyser (30 August 2011) 26 (14482783381).jpg - Ser Amantio di Nicolao

Grand Prismatic Spring (near center) & Indigo Spring (below & left of center) & Excelsior Geyser-Turquoise Pool-Opal Pool (right) (30 August 2011) (14299409467).jpg - Ser Amantio di Nicolao