Most of the articles on this site is my own work, but of course there is a lot of information that I got on other great places and it is only right to extend credit. In no particular order then:
Probably the most comprehensive site on South African Mountain Passes, is www.mountainpassessouthafrica.co.za where I filtered out gravel road passes in particular those recommended to 4x4 vehicles.
Most of the shipwrecks was taken from the database of www.sashipwrecks.com. I ordered the CD a few years ago from Casper du Plessis a who dedicated a large chunk of his life to this subject.
The Lighthouses are now easy to find. I got that from good old en.wikipedia.org and simply had to convert the coordinates to make it suitable for Google Maps.
To get some better information in our vehicles section I would like to thank the personal contributions from members of 4x4community.co.za.