WBEZ: Map Quest: Searching for Chicago’s ‘Lizard Mound’: An odd detail on a map suggests Chicago may have once been home to an ancient effigy mound.

Map Quest: Searching for Chicago’s ‘Lizard Mound’

Story at link above.

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Dilg’s map shows a lizard-shaped mound on the block bounded by Oakdale Avenue, Sheffield Avenue, Wellington Avenue, and Mildred Avenue (formerly “May Street”), oriented from north to south, in the western third of the block. (Courtesy Chicago History Museum, Charles A. Dilg collection)