It is illegal to use water pistols during New Year celebrations in Cambodia
The East. If you have time, energy and cash a trip east into lands basically untouched by tourism is a very special experience
But You Can Miss
The Killing Fields. Since they have become privatized and turned into a money generating business (sadly, not money for the survivors and victims of the terrible crimes that occurred there) it is hard to justify spending your tourist dollars here.
*Map from http://www.en.m.18dao.net