Keystone is perhaps best known by locals for the ferry crossing that goes from Whidbey Island to Port Townsend. I, like so many, take this crossing regularly either visit family or to venture out to the Olympic Peninsula. The ferry port is just below the old Fort Casey (Historical State Park), and directly adjacent to where the ferry makes its runs for the day, are some old dock piling and line of rocks making a jetty. Match that with a strong current in that area, and you have yourself the perfect conditions to find yourself a GPO, or the Giant Pacific Octopus (Enteroctopus dofleini).