Fodor's Expert Review Cambodia Land Mine Museum
Be sure to visit this museum, established by Aki Ra, a former child soldier who first fought for the Khmer Rouge, then the Vietnamese, and finally the Cambodian Army. Now he dedicates his life to removing the land mines he and thousands of others laid across Cambodia. His museum is a must-see, a sociopolitical eye-opener that portrays a different picture of Cambodia from the glorious temples and five-star hotels. Any tuk-tuk or taxi driver can find the museum, your entry ticket helps land-mine victims go to college.
As it is a decent distance from Siem Reap, it's best to combine this with a visit to the Banteay Srey Temple complex.