If your trip to Sandhausen is all sorted out but your itinerary is a little on the empty side, let us give you a helping hand.A scan of a postcard stand will tell you that a visit to Sandhausen is not complete without going to Heidelberg Castle. Considered the most famous attraction in the area, you might want to schedule more time here than a quick stop.Keep yourself busy by visiting Hockenheim Racing Track and Schwetzingen Castle. One more sight to think about stopping at is Church of the Holy Spirit.