Page "Lake County, Oregon" Paragraph 25
from
Wikipedia
Lost Forest Research Natural Area is a protected relic forest closely associated with the Christmas Valley Sand Dunes in northeastern Lake County.
Crack in the Ground, northeast of Christmas Valley is a long fissure with ice in its floor year round.
Big Hole, Hole-in-the-Ground, and Fort Rock are ancient maar craters in the northwestern part of the county.
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