Rhinoceros Lake is just one of the lakes in Jiuzhaigou Valley (九寨沟), in Sichuan, China. It has a deep, fascinating green-blue colour which reflects the autumn painted trees miraculously. The footpath on the opposite side of the road is nearly empty; if you want to escape the crowd and have a little time with nature there, explore this area.
(Oh, by the way: this entry was written by Peter Molnar, and originally posted on petermolnar dot net.)