In Gauteng, South Africa
How Geocaching Works
Experience the Ghost bridge of Heidelberg. It is said that there is a ghost here that pushes your car up the hill over the "ghost bridge". This is your chance to see if this is true. The brave will do this at night, but do take care and be alert. There may be a couple of mugglers around. Bring your own pencil/pen.
This cache is NOT accessible from the N3 highway. Approach it from Plein street (Rensburg) This is a public road so do take care of oncoming vehicles and pedestrians walking next to the road. Please leave the way point and cache exactly as you found it.
Most of all enjoy the experience!
This is a two stage multi.
The science behind this tale:
From Wikipedia, the free encyclopedia
A gravity hill, also known as a magnetic hill and sometimes a mystery hill, a mystery spot, or a gravity road, is a place where the layout of the surrounding land produces the optical illusion that a very slight downhill slope appears to be an uphill slope. Thus, a car left out of gear will appear to be rolling uphill due to gravity. In bicycle racing, such roads are known as "false flats."
There are hundreds of gravity hill locations around the world. See list of gravity hills.
The slope of gravity hills is an optical illusion, although sites are often accompanied by claims that magnetic or even supernatural forces are at work.
The most important factor contributing to the illusion is a completely or mostly obstructed horizon; without a horizon, judging the slope of a surface is difficult as a reliable reference is missing. Objects one would normally assume to be more-or-less perpendicular to the ground (such as trees) may actually be leaning, offsetting the visual reference. The illusion is similar to the well-known Ames room, in which balls can also appear to roll against gravity.
- ^ University of California Riverside article on phenomenon
(No hints available.)
Last Updated: on 5/20/2013 7:09:00 AM Pacific Daylight Time (2:09 PM GMT)
Coordinates are in the WGS84 datum