An arch bridge is a bridge with abutments at each end shaped as a curved arch. Bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by at either side. Ancient architecture building calculation construction craft engineering forest medieval river stone structure mount art aesthetics regular symmetric visual stream creek brook rivulet forests mountain mountains way road roads aerial drone crane camera wall view tree trees woods architectonics unspoiled unmanned nobody buildings structures success real unused old disused idle abandoned unserviceable rock. 3840X2160 4K UHD.