The Alwas-Killar Road bus route in Pangi Valley, India is one of the most dangerous bus routes in the world. The guy in the video says the drop is 2000 feet, but looking it up it’s actually closer to 15000. That’s a three mile drop:

https://www.youtube.com/watch?v=hhhfClKndPY

Preferable to getting Sparta Kicked out of the top of a double decker, I suppose.