My friend Kathleen and I visited some Seattle cemeteries yesterday. The cemetery on Queen Ann (that's a hill in Seattle for those of you who don't live in the area) is perfect for my story.
See the cat? It led me to a secret entrace to the cemetery. There's a hole through the hedges right behind the cat. I know hard to see from this angle (and resolution), but it's there, a small path, just big enough for a human... or a cat.