Double stacked terrain and one in the background from the High Resolution Terrains Set 2 with materials combined from the High Resolution Terrain Set 1 & 2 and Landscapes under Fantastic Skies. Sky and ambient light from the HDRI Enhanced Skies set and clouds from the Sky Toolbox (*). Everything available at Daz 3D, except (*) at bryce-tutorials. The Grobburg was available at Daz 3D a long time ago. A secluded monastery.