Engineer's Office in Mammoth Hot Springs (4263) Engineer's Office in Mammoth Hot Springs (4264) Engineer's Office in Mammoth Hot Springs (4266) Fireplace in Mammoth Hot Springs Hotel (4271) Mammoth Hot Springs Visitor Center (4252) Mammoth Hot Springs Visitor Center (4272) Mammoth Hot Springs Warning (4253) Our 'Alligator Mess' by W.A. West (4255) USA Map in Mammoth Hot Springs Hotel (4269) Visitor Center in Mammoth Hot Springs (4254) Some Animal's (not a bear) Poop On The Sidewalk in… Stuffed Beaver in Visitor Center Exhibit (4259) Stuffed Mountain Lion in Visitors Center Exhibit (… Stuffed Wolf In Visitors Center Exhibit (4257) Interesting Facts Concerning the Large Inlaid Map… Mammoth Hot Springs (4279) Mammoth Hot Springs (4293) Mammoth Hot Springs (4288) Mammoth Hot Springs (4289) Mammoth Hot Springs Boardwalk (4294) Mammoth Hot Springs Boardwalk (4295) Mammoth Hot Springs (4290) Mammoth Hot Springs (4291) Mammoth Hot Springs (4292) Minerva Terrace (4280) Minerva Terrace (1) Minerva Terrace (4278) Minerva Terrace (1714) Minerva Terrace (2) Minerva Terrace (3) Porcelain Basin (1) Black Growler & Faint Rainbow (1716) Ledge Geyser & Black Growler (4321) In Porcelain Basin (4303) Living Thermometer (4318) Thermophilic Colors (4319) Thermophilic Colors (4320) Norris Geyser Basin Museum (4296) Porcelain Basin (2) Porcelain Basin (4322) Crackling Lake (4329) Vent & Insect (4330) Vent & Insect (4330A) Norris Geyser Basin Museum (4331) Black Growler Steam Vent (4301) Steam Vent (4302) In Porcelain Basin (1717) Porcelain Basin 360 Norris Geyser Basin Museum (4332) Norris Geyser Basin Museum (4297) Bison (4335) Bison Crossing The Road (4336) Bison Crossing The Road (4337) Bison in Hayden Valley (1) Bison Near Canyon Village (4334) Bison Near Canyon Village (4334A) Elk (1718) Elk (1719) Elk (1720) Yellowstone Lake (2) Subway in Wyoming (3585) Big Horn Sheep in Mammoth Hot Springs Visitor Cent… Big Horn Sheep In Mammoth Hot Springs Visitor Cent… Phone Booths in Mammoth Hot Springs Hotel (4270) Elk in Mammoth Hot Springs Visitor Center (4260) 1907 Rules & Regulations (4262) Undine Falls on Lava Creek (1710) Tower Falls (4248) Tower Falls (1704) Near Tower Falls (1705) Visitors to Tower Falls (4249) Undine Falls on Lava Creek (1712) Undine Falls on Lava Creek (1711) Foliage (1713) Clogs (4250) Bison (4251) Bison (1709) Bison (1708B) Bison (1708A) Bison (1706) Bison (1708) Bison (1707) Yellowstone River at Dusk (4244) Yellowstone River at Dusk (4243) Yellowstone River at Dusk (4241) Yellowstone River at Dusk (4246) Yellowstone River at Dusk (4234) Yellowstone River at Dusk (4233) Crescent Moon Over Yellowstone (4247) Yellowstone River at Dusk (4240) Yellowstone River at Dusk (4239) Yellowstone River at Dusk (4238) Yellowstone River at Dusk (4237) Yellowstone River at Dusk (4236) Yellowstone River at Dusk (4235) Andy On Fishing Bridge (4242) Uncle Tom's Trail Platform (4224) Uncle Tom's Trail (4230) Uncle Tom's Trail (4229) Uncle Tom's Trail (4228) Uncle Tom's Trail (4211) Uncle Tom's Trail (4206) Photographer at Artist Point (1673) Bridge Over The Yellowstone River (1693) Yellowstone River Lower Falls (1) Yellowstone River Lower Falls (1651) Yellowstone Caldera (4151) Yellowstone River Upper Falls (4193) Visitor at Upper Falls On The Yellowstone River (1… Upper Falls On The Yellowstone River (4198) Upper Falls On The Yellowstone River (4194) Upper Falls On The Yellowstone River (4192) Upper Falls On The Yellowstone River (4190) Upper Falls On The Yellowstone River (1691) Yellowstone River Upper Falls (1) Visitors to Upper Falls On The Yellowstone River (… Upper Falls On The Yellowstone River (1688) Upper Falls On The Yellowstone River (1666) Visitor to Upper Falls On The Yellowstone River (1… Visitor to Upper Falls On The Yellowstone River (1… Upper Falls On The Yellowstone River (1689) Upper Falls On The Yellowstone River & Rainbow (16… Above The Upper Falls On The Yellowstone River (41…