Out for a bit of adventuring again. I know for fact that the city parks around my neighborhood are no older than 25 years. However, they were built on a farming land, which means there is quite a lot of potential stuff underneath the development layer, even in the parks. As it turn out today, I probably found something fairly old, probably pre-1950s given that its cast iron and big. See the photos for yourself...no idea what it is though.