#1.

Wall SD 57790, United States of America

  • Inscription. Thirty-seven million years ago, the ancient crystalline core of the Black Hills had already been exposed by erosion. The long blue profile of those mountains, visible to the west, looked much as it does now. About that ... More on HMDB

 

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#2.

Wall SD 57790, United States of America

  • Inscription. A jungle grew here. Before that, a shallow sea covered the land. Both are gone now, but both left evidence of their passing. The sea's signature is ammonites, baculites, and clams, pearly fossils entombed in a fossil ... More on HMDB

 

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#3.

traveling west on I-90, take Exit 131, Wall, South Dakota

5.0
User Rating (1 sources) ×
  • Trekaroo
  • Such a wide variety to see and experience! More on Trekaroo

 

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