There are currently two helicopter companies operating in Cambodia. They both offer a wide range of services, including scenic flights over the Angkor Temples. For those who like flying, this is a unique and exciting way to see the famous temples of Angkor, the more remote temples, and sweeping countryside vistas.
In the past several years, all types of off-roading has become very popular in Siem Reap. This is mainly because of the nice countryside around Siem Reap, and also because of the many remote ancient Angkor temples in the area. Of course the remote temples can be reached by van, but for some people, its much more exciting and adventurous to go off-road. There are companies that offer dirt bike, quad bike, and buggy tours.