Probably the most popular single activity is quad-biking over the large red sand dunes that start from the edge of the town.
For the novice, there are fully automatic bikes which are extremely easy to control and very stable, or if you are more of an expert you can opt for a manual bike with gears. Everyone is kitted out with crash helmets and goggles, and your guide leads you off into the desert.
Do not expect a geological history of the desert from your guide on these trips - quad-biking in Swakopmund is about adventure, not education!
Groups can be as small as one or 2, and trips from one hour to one day are possible: however long you go for the trip will be great fun, and remember to take a camera as the scenery is spectacular.