SHORT & CRISP: THREE BRISK BIKE TOURS. Spring is here, everyone finally wants to get out again, get some fresh air and enjoy the sun. After the long winter, it’s also high time to top up your vitamin D stores. The current weather is perfect for the first bike rides. We’re getting the bike out this weekend and going for a little ride. Here are our tips for three short bike tours: By bike to Walhalla Just before the Danube…