The rainbow above the fall is really amazing!
There're many visitors but you don't feel crowded.
Unlike most tourist-actracting places in China, in NF you feel very relax and safe, no begger, no kids trying to cheat you, no sky-rocketting prices and no fear on being robbed or theft.
BTW, I didn't go to the casino, I cared my money too much and I didn't believe I had good luck then. :-)