Roundhay Park

One of the largest urban parks in Europe, and certainly the largest park in the city, this consists of 700 acres of parkland, lakes, woodland, and gardens. Of course, now they're all rather overgrown. Still, it's a fairly good spot to set up camp for a short while, if only for the proximity to water and wood. It's also relatively safe, in spite of being rather open, due to its massive size.