ETH-BIB-Zürich-Witikon, Schulhaus-Inlandflüge-LBS MH01-005120A photo about 2 years 0 Sky nature wood photo over 3 years 0 Sky nature wood photo over 3 years 0 Wood building architecture photo over 3 years 0 Nature sky road photo over 3 years 0 Nature grass farm photo over 3 years 0