Sitting right on the banks of the Mekong, Chiang Khan capitalises on its great location with a thriving tourist industry. With great views across to the mountains of Laos, its main attractions are a lovely esplanade along the river and the quaint wooden shophouses of its 'walking street' (which actually does have a few cars). It's a popular spot for holidaying Thais and a great place to spend a few days relaxing.
At time of writing there were plans to extend the esplanade along the Mekong all the way out to Kaeng Khut Khu, which would make it a nice 4km walk.
Read more: http://www.lonelyplanet.com/thailand/loei-province/chiang-khan#ixzz3yFgomUuM