Dragon's Mouth Spring (4140) Dragon's Mouth Spring (4138) Sulfur Caldron (4143) Sulfur Caldron (4144) Sulfur Caldron pH Chart (4150) Sulfur Caldron (1) Bison in Hayden Valley (1647) Bison in Hayden Valley (1643) Bison in Hayden Valley (1644) Bison in Hayden Valley (1645) Bison in Hayden Valley (1646) Photographing Bison in Hayden Valley (4156) Grand Canyon of the Yellowstone River (1656) Grand Canyon of the Yellowstone River (1658) Grand Canyon of the Yellowstone River (1657) Grand Canyon of the Yellowstone River (1680) Grand Canyon of the Yellowstone River (1683) Grand Canyon of the Yellowstone River (1685) Grand Canyon of the Yellowstone River (1686) Grand Canyon of the Yellowstone River (1663) Grand Canyon of the Yellowstone River (1679) Grand Canyon of the Yellowstone River (4157) Grand Canyon of the Yellowstone River (4158) Grand Canyon of the Yellowstone River (1654) Grand Canyon of the Yellowstone River (1655) Grand Canyon of the Yellowstone River (4159) Grand Canyon of the Yellowstone River (1687) Grand Canyon of the Yellowstone River (1698) Grand Canyon of the Yellowstone River (1702) Grand Canyon of the Yellowstone River (1669) Grand Canyon of the Yellowstone River (1674) Grand Canyon of the Yellowstone River (1675) Grand Canyon of the Yellowstone River (1677) Grand Canyon of the Yellowstone River (4160) Grand Canyon of the Yellowstone River (4162) Grand Canyon of the Yellowstone River (4164) Grand Canyon of the Yellowstone River (4168) Geysers In Grand Canyon of the Yellowstone River (… Grand Canyon of the Yellowstone River (4175) Grand Canyon of the Yellowstone River (4184) Grand Canyon of the Yellowstone River (4185) Grand Canyon of the Yellowstone River (4186) Geysers in Grand Canyon of the Yellowstone River (… Geysers in Grand Canyon of the Yellowstone River (… Grand Canyon of the Yellowstone River (4171) Grand Canyon of the Yellowstone River (4174) Grand Canyon of the Yellowstone River (4218) Grand Canyon of the Yellowstone River (4219) Grand Canyon of the Yellowstone River (4225) Visitor to Grand Canyon of the Yellowstone River (… Visitors at Artist Point (4204) Grand Canyon of the Yellowstone River (4227) Mossy Branch in Grand Canyon of the Yellowstone Ri… Mossy Branch in Grand Canyon of the Yellowstone Ri… Visitor to Grand Canyon of the Yellowstone River (… Grand Canyon of the Yellowstone River (4187) Grand Canyon of the Yellowstone River (4188) Grand Canyon of the Yellowstone River (4203) Grand Canyon of the Yellowstone River (4210) Chipmunk (1694) Chipmunk (1695) Chipmunk (1696) Chipmunk (1697) Mud Volcano Area (1641) Dragon's Mouth Spring Visitors (4141) Dragon's Mouth Spring (4139) Dragon's Mouth Spring (1642) Yellowstone Lake Lodge View (4099) Yellowstone Lake Lodge Lobby (4114) Yellowstone Lake Lodge Lobby (4113) Yellowstone Lake Lodge Lobby (4112) Yellowstone Lake Lodge Lobby (4109) Yellowstone Lake Lodge Lobby (4108) Yellowstone Lake Lodge Lobby (4102) Yellowstone Lake Lodge Lobby (4101) Yellowstone Lake Lodge Lobby (4100) Yellowstone Lake Lodge Cafeteria Windows (4104) Yellowstone Lake Lodge Cafeteria (4107) Yellowstone Lake Lodge Cafeteria (4106) Yellowstone Lake Lodge Cafeteria (4105) Yellowstone Lake Lodge Cafeteria (4103) Yellowstone Lake Lodge Urinals (4110) Yellowstone Lake Lodge (4098) Coke Machine - Yellowstone Lake Lodge (4111) Yellow Bus at Lake Yellowstone Hotel (4134) Yellow Bus at Lake Yellowstone Hotel (4123) Yellow Bus at Lake Yellowstone Hotel (4122) Yellow Bus at Lake Yellowstone Hotel (4121) Yellow Bus at Lake Yellowstone Hotel (4120) Lake Yellowstone Hotel (4137) Lake Yellowstone Hotel Urinals (4135) Lake Yellowstone Hotel (4124) Lake Yellowstone Hotel (4115) Yellowstone Lake (1) Yellow Bus at Lake Yellowstone Hotel (4119) Lake Yellowstone Hotel Lobby (4118) Lake Yellowstone Hotel Lobby (4117) Lake Yellowstone Hotel (1) Coke Machine in Lake Yellowstone Hotel (4136) Lake Yellowstone Hotel Lobby (4116) Seismograph Pool (1) West Thumb Geyser Basin (4095) West Thumb Geyser Basin (4093) West Thumb Geyser Basin (4092) West Thumb Geyser Basin (4091) West Thumb Geyser Basin (4076) West Thumb Geyser Basin (4071) Seismograph Pool (4072) Fishing Cone (4085) Bluebell Pool (4074) Blue Funnel Spring (4096) Yellowstone Lake from West Thumb Geyser Basin (1) West Thumb Geyser Basin compared to Yellowstone Ca… West Thumb Geyser Basin - Yellowstone Lake (4082) West Thumb Geyser Basin (4097) West Thumb Geyser Basin - Yellowstone Lake (4083) Seismograph Pool (4075) Seismograph Pool (4073) Big Cone (4086) Abyss Pool (4094) West Thumb Geyser Basin - Yellowstone Lake (4087) West Thumb Geyser Basin (4070) Yellowstone Area Map (3736) Flagg Ranch Cabins (1640) Downstream From Grand Geyser (4019)