Angkor Wat rightly claims a spot near the top of many travelers’ bucket lists, but for most of the area’s 2.5 million annual visitors, the standard visit is about three days—just enough time to wander through the archaeological park’s central ruins and get sufficient selfies. That strategy is a mistake. The city of Siem Reap, a genuine beauty, is home to about 140,000 Cambodians and riches worth lingering for.