The last capital of the Khmers is a stupendous complex on a stupefying scale; established in the 12th century on the site of an earlier capital, Angkor Thom dwarfs even nearby Angkor Wat. The city’s 7.5 miles (12 kilometers) of wall is ringed by a moat (which no longer holds water or – thankfully – crocodiles). Each of the five enormous gates is a monument in itself, approached by avenues lined with 108 divinities (good on the left, evil on the right).
Some elevation will help you make sense of the layout; head for the Terrace of the Elephants or nearby Terrace of the Leper King with their intricate carvings, or the hilltop Phnom Bakheng, particularly popular at sunset. Among the myriad other points of interest are the temples of East Mebon and Pre Rup, built in the same “temple-mountain” style as Angkor Wat.