Fred Duquenne:
Yellow trees / St. Croix River/ Minnesota State Parks-
Fred Duquenne:
Mosaic of the Autumn woods
Fred Duquenne:
St. Croix River Park_green pool crevasse 1x1
Fred Duquenne:
The speed of light/ St. Croix River Minnesota State Parks
Fred Duquenne:
Sky in the mirror
Fred Duquenne:
Waist-high natural cave
Fred Duquenne:
Glacial pothole
Fred Duquenne:
Glacial pothole_2