I used to travel a lot with this indie band, Joe 90. While travelling to the nearly non-existant town of Independence, Orgeon, they came to an impossible situation, thanks to the brilliance of Mapquest. Basically, the road just stopped. At the banks of a river. Since they did not have a floating van thing a la Oregon Trail, they turned around, and ended up late for their own show. Always check mapquest against other sources. I believe they even have a disclaimer somewhere on their site suggesting "do a reality check and make sure the road still exists."