Just as impressive as its neighbour Sukhothai, the old city of Si Satchanalai (a UNESCO World Heritage Site since 1990) suddenly appears out of the forest on the right bank of the River Mae Nam Yom. In a more peaceful setting than Sukhothai, it contains the magnificent remains of a number of temples, such as Wat Chang Lom and Wat Chedi Chet Thaeo, which can be identified by their white bell-shaped chedi. The old city is accessed via the Pratu Dom Laem gate, built in the thick walls surrounding the city.