Roll out of Calau - Kalawa and let the ride unfold: 55.4 km with 230 m of climbing, mostly unpaved. Pass the castle at Dunkelsburg, then the Reptener Teiche nature reserve and the Lausitzer Bergbaufolgelandschaft. On to the Gräbendorfer See lake, through the Sorbisches Siedlungsgebiet nature reserve, and back to where you started.