Kolmanskop is a ghost town not too far from Luderitz, abandoned by German miners after the 1920's. In the 1980's, diamond giant De Beers refurbished some of the structures and established an on-site museum. After you check in and get your permit, you're allowed to wander freely through the small village. Piles of sand have accumulated in and taken over some of these colonial-era homes, an indication of how hard it must have life was for inhabitants. It's an excursion that involves some planning beforehand, but it's worth it for the photographic opportunity. Kolmanskop is about 3 hours from Keetmanshoop and 5 hours from the Fish River Canyon, down the dead-end road to Luderitz on Namibia's coastline, so you'll want to time your excursion down this way bearing that in mind.