Mine shaft entrance along Silver Mountain Trail, Silver Mountain Ancient Volcanic Vent Plug Special Interest Area, Ottawa National Forest, Michigan

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Size: 3840px × 5760px
Location: Ottawa National Forest, Michigan
Photo credit: © George Ostertag / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: ancient, area, entrance, forest, gate, gated, interest, michigan, mountain, national, ostertag, ottawa, peninsula, plug, shaft, silver, special, states, trail, united, upper, vent, volcanic, woods