Rio Colorado Geologic 1858 Map Frame:Black That’s the spirit that underlies

That’s the spirit that underlies our map of Mammoth Cave National Park

or Bewick's Wren

or Oil Shark

or Humphrey's Grasshopper

Just the natural beauty of the landscape (plus the Pacific Crest Trail and Pacific Northwest Trail) represented in exquisite detail

Rio Colorado Geologic 1858 Map Frame:Black That’s the spirit that underliesThis beautiful map was the result of an exploration under the direction of the Office of Explorations and Surveys headed by 1st. Lieut. Joseph C. Ives in 1858. The map was drawn by Frhr. F. W. v. Egloffstein, the topographer to the expedition, who used a unique engraving process that resulted in the stunning rendering of the topographic features.