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Lycoperdon perlatum
About 38 mm (1.5 in) tall. To view the 3D photo, get at least 50 cm (1 ft 8 in) from your monitor, (make sure to look directly at the monitor, not from the side) and cross your eyes just enough to bring the 2 photos together. You should see 3 photos and look at the "center" one. It may take a few seconds to become clear and 3D.
Hardwood forest in a park in Chapel Hill, TN. This site doesn't seem to be letting me add that location at the moment though.