The sky above YellowstoneIn the clear air of the high altitude country of Yellowstone National park cloudscapes compete with the displays of geysers and hot springs. Where to look? Up, down, everywhere? | |||
 Alien spaceships? (Altocumulus lenticularis) |  Cirrus above the steam of Grotto Geyser |  Cumulus humilis above Lower Falls of the Yellowstone River |  The sky's glorious light caught in the Lower Falls of the Yellowstone River |
 Cumuli above erupting Tower Geyser |  Altocumulus above Old Faithful Geyser (not erupting) |  Altocumulus lenticularis behind Daisy Geyser |  Stratocumulus at sunset; Castle Geyser in «steam phase» |