The route to province of the northern of Thailand is the past way of several province that you can choose to drop in and visit such as Sukhothai, Lampang, Payao before go forward to Chiang Rai, the boarder province of Thailand, Burma and Laos and this route will lead you to Kengtung, The land of Thai Ken and ThaiYai
Visit Prosperity in the past that was praised as a world heritage site in Sukhothai Historical Park and Si Satchanalai Historical Park that has a lot of Archaeological site such as Wat Mahathat, Wat Si Chum, Wat Phra Sri Rattana Mahathat Wat Chang Lom, Wat Chedi Chet teow etc.
Try to travel by boat in Phayao Lake, The 3rd biggest lake in Thailand. Go to worship Luang Pho Sila at Wat Te Lok Aram, Temple on the island in the middle of Phayao Lake and go to Doi Bussarakham and Buddhist Park.
This is province of the northern of Thailand. Chiang Rai is land of hill for travel such as Doi Mae Salong, Doi Chang, Doi Pha mhee etc. and also has antique town in Chiang saen or King Meng Rai Monument, Phra That Chom Thong, Rai Mae Fah Luang, Wat Rong Khun and Oub Kham museum in centre city of Chiang Rai.
Out of Thailand at the Mae Sai to Tachilek, Burma and go forward to Kengtung in Shan State Burma, The land of Thai Ken and Thai Yai. Go to worship the relics of Chom khum, Mahamuni Buddha Temple and Maha Myat Muni temple which all of them older more than 700 years and all of them was built in beautiful Mandalay's art and go to visit lively morning market.