Postcards and photographic material created by photographer John Albert Topolnicki Sr. featuring the Colorado natural landscape, mountains, abandoned mine sites, ski areas and similar subjects. His photographs are considered the best historical record of Breckenridge Ski Resort and Summit County, Colorado landscapes in the early 1960s-1970s.

Sheet film negatives circa 1910-1920s showing snow slides blocking the railroad in Ten Mile Canyon. Also, views of mine sites and structures east of Breckenridge and near Montezuma, Colorado.