I came across these overgrown, ruined buildings while walking along the Old Croton Aqueduct Trail. The bars make them look something like a jail, but I don’t suppose they were. Bars can, of course be used to keep people out too. Maybe something valuable was once kept inside. Judging from their location they are in some way connected with the Lenoir Preserve or one of the mansions (Lenoir Mansion, Ardenwold) that stand/stood there.
Taken with a Fuji X-E1 and Fuji XC 16-50mm f3.5-5.6 OSS II