A British ambulance blindly followed their GPS system 200 miles the wrong way while ferrying a patient from the King George Hospital in Ilford to the Mascalls Park Hospital near Brentwood.
The trip is only 12 miles and should only take about thirty minutes, but the ambulance crew turned it into an eight-hour roundtrip to Manchester.
Story from here. The reason why it's alway best to have someone with you who actually knows the way. Old fashion maps and even complicated GPS system can lead you to another planet at a certain point.