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gem icon Thunderbird Effigy Mound

1 vote

Overview

Constructed by Native Americans 1,000 years ago and with a 200 foot wingspan, this is the only remaining thunderbird effigy mound left in the state of Illinois!

Short Walk: Runners can access the mound from the Casper Bluff South Loop.

Gem Type: Prehistoric Site

Shared by:
Jim Johannsen

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Shared by Jim Johannsen on Feb 13, 2017. All Page Views: 195. Last Month: 27.