Magnet Hill is a
gravity hill located near Leh in Ladakh, India. The hill is alleged to have
magnetic properties strong enough to pull cars uphill and force passing
aircraft to increase their altitude in order to escape magnetic
interference. This is likely
based on the illusion that some people see of objects which appear to roll up a
hill. In reality, this is purely an optical effect caused by the specific
layout of hills and deceptive fields of reference.