Overtoun Bridge, near Dumbarton in west Scotland, has become famous for the number of unexplained instances in which dogs have apparently committed suicide by leaping off of it. It has been the scene of at least fifty, unexplained, dog deaths.
The incidents were first recorded around the 1950's or 1960's when it was noticed that dogs - usually the long-nosed variety like Collies - would suddenly and unexpectedly leap off the bridge and fall fifty feet to their deaths. In some cases, however, the dogs would survive, recuperate, and then leap off the bridge again.
A rational explanation for the "dog suicides" could be the mink population that resides under the bridge in the brush. Veterinarians and animal experts have pointed out that a dog, overly excited at the smell of the minks and unable to see over the sides of the bridge, might leap over the side on impulse not realizing that they are on a bridge at all.
Or they were extremely depressed; the misplacement of their buried bones could have had more serious ramifications than anyone thought.