The Flatirons are the striking, slanted, reddish-brown sandstone formations that make up a portion of Boulder’s foothills on the west side of town. They are Boulder’s most iconic landmark.
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From @goodvibez
The Flatirons are the striking, slanted, reddish-brown sandstone formations that make up a portion of Boulder’s foothills on the west side of town. They are Boulder’s most iconic landmark.