HMI Geoglyph

Geoglyph: A large form or motif created in or on the land by humans from sediment, stones, or other clastic detritus. Geoglyphs often have a dual purpose; they are a kind of land art in that they express or reflect the values, stories, and aesthetics of a culture that makes them, and they were often made for practical purposes such as drainage or flood control, defense, or to create environments such as aquaculture ponds.

Hart-Miller Island is a large constructed island outside of the Baltimore Harbor in the Chesapeake Bay.