Inside an old hospital I wasn’t the most intrepid explorer that day since I was alone and there was recent evidence of squatters. Edited the graffiti below to cover an image that rhymes with “schmecker”.
This is in the Presidio (Former) Army Base here in San Francisco It is near some old Hangars at Crissy Field which used to be an air strip. Looks like one of those service ramps to drain fluids from vehicles. It's definitely not being use for this any longer..