A plan map (above) and a section map (below) of Niagara Cave. Published in R. K. Bower and T. N. Bayer’s Guide to the Caves of Minnesota (Minneapolis: Minnesota Geological Survey, 1967), pages 28 and 39.
Twin stripes of green marble—said to honor Father Michael J. Casey’s Irish heritage—in the floor leading up to the altar of the Church of St. Columba (St. Paul). Photograph by Paul Nelson, August 16, 2017.