Gull Lake Dam construction diagram, 1910.

Mortar barrel made from the trunk of a gum tree and bound with iron bands. The mortar was made by a member of the Seventh Minnesota Infantry Regiment and used during the siege of Spanish Fort, Alabama, part of the March–April 1865 campaign against Mobile.

American Indian Movement (AIM) members honor those who died in the Wounded Knee occupation with a gun salute. Photograph by Jon Lurie, 1998. Used with the permission of Jon Lurie.

Gunflint Lodge on the Gunflint Trail in Northern Minnesota. Photograph by Tony Webster, July 22, 2017. CC-BY SA 2.0.