Tourists simply cannot say theyve been to siem reap if they havent visited its biggest claim to fame the angkor temples built in the early 12th century the angkor is one of few unesco world heritage listed sites and cambodias most valuable monument angkor is breathtaking to say the least and siem reap owes its booming tourist numbers to this majestic site with angkor wat standing as a reminder of such a grand past its no wonder that siem reap has picked up the pieces so diligently a