Pict. [Earthporn] The Blues and Greens of Yellowstone's Geyser Basins [4096x3072] (#Yellowstone #Blues #Geyser #Basins)Pict. 4096×3072 px
Pict. [Mapporn] Geographic extent of Adena and Hopewell mound building cultures, 1500 BC - 400 AD. Ohio and Mississippi River basins, (#River #Building #Geographic #Ohio #Cultures #Hopewell #Adena)Pict. 1564×2064 px
Pict. [Mapporn] Hydrologic Units (Watersheds-Basins) of the United States [2500x1724] (#States #United #Units #Basins #Watersheds #Hydrologic)Pict. 2500×1724 px
Pict. [Mapporn] International River Basins of Europe [1020x816] (#Europe #River #International #Basins)Pict. 1020×816 px
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