Chiang Saen is about 60km northeast from Chiang Rai, 11km south from Ban Sop Ruak, and 37km southeast from Mae Sai. The town watches over the Mekong River, and just south of it the Mekok River, arriving from Chiang Rai, meets the Mekong. Modern Chiang Saen is shaped as a letter "T," the top being the Mekong riverside. At the center of town, road 1290 from the north splits into road 1016 to Mae Chan 32km to the west and road 1129 to Chiang Khong 53.1km to the south. The city was built in a rectangular shape, 1,400m wide and 2,400m long in a north-south orientation and originally had 11 gates. King Saenphu, the grandson of King Mengrai, Chiang Rai’s founder, established it in 1328. Its importance in the Lanna kingdom declined with time, and it became mainly a religious center. In 1558, the Burmese conquered it. Following a long period of battles between the Thai Ayuthaya kingdom and the Angwa Burmese, the Thai re-conquered it in 1803, after troops from Chiang Mai, Phrae, Nan, and Lampang united and repelled the Burmese from their last base in northern Thailand. To avoid it from being used again as a stronghold, the city wall was then partially dismantled.
All over the town are visible the stained red brick ruins of the Chiang Saen kingdom. At the west entrance, when coming from Chiang Rai, there is an interesting circular gate, maybe the best of its type in Southeast Asia. From north to south we can see Wat Sang Ka Keow Don Ton. At the northern entrance are Wat Sang Ka Keow Don Ton. Only a few columns and its base are left. Immediately after the ruins, the northern side of the promenade begins.
Municipality Building: At the municipality building by the main junction in front of the river, there are six big statues of birds, two at the south and four at the north side of the entrance. The smallest statue is some 1.8m high, and the largest about 3.5, all of them with a feathers outer layer.
Main Junction: At the junction itself, the town’s center, there is a sign over the riverside saying: "Welcome to Chiang Saen Land of Golden Triangle." The immigration checkpoint is just a few meters south from the junction, with officers speaking good English and willing to help.
Twenty meters south of the junction are the flat ruins of the very small Wat Ku Kham; they date from the 16th to 17th centuries. After the ruins, a colorful playground with metal swings provides some recreation to local children. The pier of the long-tailed boats to Chiang Khong is right after the playground. Another small pier is at the northern side of the junction and serves mainly the Ban Sop Ruak direction. Farther away, at the opposite side of the road, there is an active temple, Wat Pong Sanuk.
Port: At the southern promenade, there is a commercial port serving lines traveling to China, Myanmar, and Laos. If you have a Chinese visa and find a willing captain, then you can leave to the Middle Kingdom.
From east to west and back to the junction and to the west we can see Wat Phra Yeun. A big stupa is next to the main immigration building; it is called Wat Phra Yeun and is usually surrounded with a yellow scarf. Somewhat later is the almost completely ruined Wat Phra Chao Thong Noi from the 16th century. Closer to the gate there are two temple complexes, one on each side of the road. At the southern side is Wat Phra Buat, a brick chedi that was constructed in 1346. Each one of its four sides is 8m long, and an adjacent vihan has the ruined remains of a Buddha statue. In front of them, at the northern side of the road is the impressive Wat Mung Muang, a chamber shaped chedi with stucco decorations, topped with a round bell and having a vihan at its side, both from the 14th century. Chamber chedis always look dramatic, maybe because of the combination of the chamber colors with the outer walls ones, or maybe due to our thoughts regarding what filled those chambers. Farther west, on the north side, there is the abandoned temple no. 6, and 30m in front of it, at the south side again, appears the biggest and highest ruins complex in the town, Wat Chedi Luang. The complex is surrounded with a bricks fence decorated with lions and praying figurines. Inside the fence there is a huge, spiky eight-sided chedi 58m high, surrounded by an inner fence. It dates back to the 12th century. Chiang Saen gate is another hundred meters to the west, on the western side of the city wall. Together with its surrounding fortifications, it was built in a double semicircular style. It was the main gate, as it provided best access to the other towns on the plain of the Mekok River. Two different semicircular walls compromise the big structure so that being outside and looking inside you would see the canal between the two walls and not the city interior. The two walls were separated by a secondary road turning north, again with no direct sight of the interior. Wat Pa Sak Wat Pa Sak is just outside the wall, between the two gates. It has a chamber or mondop-shaped chedi with five bell-shaped finials. This chedi was built on a base with an architectural influence from Chedi Ku Kut, while Chedi Chiang Yan inspired the relic chamber and the spire. Both chedis are in the Lamphun province. The decorations reflect pagan, Chinese, Khmer, and Sukhothai artistic influences. A Buddha relic was brought to Chiang Saen in 1295 and the stupa was built for it. The 300 teak trees planted around the wat gave it his name as Wat Pasak, which means the temple of the teak forest.
Activities: The short distance between Ban Sop Ruak and Chiang Saen invites an afternoon walk along the Mekong. It is possible to do it in a 90-minute walk, and if you get tired, you can always wave down one of the passing trucks.
Transport: From the bus station along the northern side of the main road, close to its middle, it is possible to take a truck to Ban Sop Ruak (10B) and to Mae Sai (30B). From the terminal at the southern side, close to the main junction, small green buses to Chiang Rai depart constantly (25B). The terminal to Chiang Khong is 100m south from the main junction along the promenade. Trucks heading there depart whenever they are full, charging 50B each passenger. Long-tail boats are available to Chiang Khong and Ban Sop Ruak from the already described piers.
Accommodations: The Chiang Saen Guesthouse is at the northern side of the promenade and offers different types of rooms. A basic room with an attached bathroom and hot water costs 250B, a similar room without hot water costs 150B, and one with shared bathrooms costs 80B.