Angkor Wat
This ancient city in Cambodia was the center of the Khmer Empire that once ruled most of Southeast Asia. This empire fell into decline, but not before building amazing temples and buildings that were later reclaimed by the jungle for hundreds of years.
Though Angkor Wat is packed with tourists, it’s still breathtaking to see. And the temple regions to the north and south see far fewer tourists than the main temple grouping. (Though admittedly, some of them are simply piles of stone rubble now.)
The most popular temples are Angkor Wat, Bayon, Ta Phrom, and Angkor Thom, and they always have crowds. In order to really experience the temples, you’ll need to purchase the three- or five-day pass. The best time to visit is early in the morning before the big tour groups arrive and stay late after they have gone.