Is there an "anti-gravity" hill in the Hill Country?

When I was a child, I remember hearing grown-ups talking about places where one's car would roll uphill when left in neutral. . .

Where was this anti-gravity hill or Spook Hill or Gravity Hill or Mystery Hill as some would call it?

In May 2007, there appeared in my favorite online magazine, National Geographic News, a report about a strange area in Canada where gravity is weaker than in the surrounding landscape. See link http://news.nationalgeographic.com/news/2007/05/070511-weird-gravity.html

This article triggered off my childhood recollection about hearing adults talk of a road in the region near northeast Monroe County Mississippi where wagons or bicycles or balls or cars or trucks would roll "uphill" when left unbraked and out-of-gear.

Does anyone know where this "anti-gravity" hill is located?

Of course everyone knows that such stretches of road are not truly spooked nor is gravity not working "right" on such hills. The explanations all agree the strange rolling uphill is an optical illusion --- that it just appears that the object is rolling uphill.

By whatever name, however, it is a neat trick to appear to roll uphill defying gravity in the process!

The Internet is full of references about "gravity hills" and some of those references makes for interesting reading. For a discussion of why gravity hills are really optical illusions, take a look at Bressan, Garlaschelli, and Barracono's interesting article complete with several pictures of "gravity hills" at http://www.psy.unipd.it/~pbressan/papers/BRESSAN_hills.pdf
The name of their research paper is Anti-Gravity Hills are Visual Illusions sums up their conclusions but in the end notes is found a list of so-called anti-gravity hills from around the world. The major ones listed in the United States by these researchers in their reference section are
Confusion Hill, Ligonier, PA
Gravity Hill, Northwest Baltimore County, MD
Gravity Hill, SR 42, Mooresville, IN
Gravity Road, Route 208, Franklin Lakes, WA
Gravity Hill, Bedford County, PA
Gravity Hill, LaFayette County, WI
Mystery Spot, Benzie County, MI
Mystery Hill, Blowing Rock, NC
Spook Hill, Lake Wales, FL
Spook Hill, Frederick County, MD

One of the most interesting accounts is about a gravity hill in Buck's County, PA. The article "The Legend of Gravity Hill" by Eric Strong appeared in the New York Times Magazine in November 1996. Link: http://endeavor.med.nyu.edu/~strone01/gravity.html

But perhaps the most interesting of all the Internet references is the list of gravity hills in the South found at Wikipedia, The Free Encyclopedia http://en.wikipedia.org/wiki/Gravity_hill There in a list of gravity hill locations is this entry:
Iuka, Mississippi: Located about 3 miles north of Highway 25 after passing the Tennessee River in Burnsville, Mississippi traveling east.

Is the anti-gravity hill I heard grownups talking about 50 years ago the one at Iuka?

The only other gravity hills mentioned in the Wikipedia article that may have been the one being discussed in Parham fifty or more years ago are located near Sylacauga and near Huntsville, Alabama.

I think, however, that the anti-gravity hill those folks at Parham had experienced was closer than Iuka or Sylacauga or Huntsville.

But where in the Hill Country was "Gravity Hill?"

And by the way, that strange spot of gravity in Canada was explained scientifically in National Geographic News. If you wish to weigh less, that spot won't help much however. The weak gravity there subtracts only about 1/10 of an ounce from a 150 pound person!

If you have any information of a local spot said to defy gravity, please contact me. Email can be sent to me by clicking the name "Terry Thornton" on the list at left and then on "Email" when my profile page opens.