structures at the sanctuary include a frame bungalow and a museum building, the former built as a caretaker's residence. significant man-made or man-sculpted features of the sanctuary include a pond, gardens, and meadows, as well as a chimney constructed as a nesting spot for chimney swifts. most of these structures were built in 1914, although the museum and bungalow have both been enlarged (substantially in the case of the museum) since then.