Sooo, there's this fence along the lake here. Lots of scary signs and a barbed wire fence. But… I can go to the public park at the lake and walk to the lake side of this fence. And I can walk in the bike path on the other side of the fence. But I can't switch.
Until today! I saw a biker turn off the bike path and disappear. It took me 30 seconds to realize what that meant. I ran over and traced his path and found a hidden hole in the fence. Completely hidden from both sides.