Spook Hill is a gravity hill — an optical illusion where the landscape makes it appear that cars are rolling uphill when they are in fact rolling gently downhill. Pull your car to the marked line at the bottom, shift into neutral, and watch it seemingly coast up the slope on its own. The trick is that the surrounding terrain is tilted in a way that scrambles your visual sense of what is level.
It is a completely silly thing to do, and is all the better for it. There is a small wooden sign explaining the legend, a few dozen tourists experiencing collective bafflement, and a nearby elementary school called Spook Hill Elementary School. Free, takes five minutes, and children will want to do it three or four times.