Northern Thailand is geographically characterized by multiple mountain ranges, which continue from the Shan Hill in bordering Myanmar and Laos. and the river Valleys which cut through them. Though like most of Thailand, it has a tropical savanna climate, its relatively high altitude and latitude contribute to more pronounced seasonal temperature variation, with cooler winters than the other regions. Historically it is related to the Lanna Kingdom and its culture. The Center of tourist in Northern is Chiang Mai, Chiang Rai , Hongson, Phetchabun ,Phissanulok The Popular place for Tourist
Mae Sariang - Hidden gem of the north, a peaceful small town valley, off the tourist trail high in authenticity and Hill Tribe culture
Mae Hong Son - Most mountainous and forested province in Thailand, with unique cultural identity due to borders with Myanmar and Shan ethnic minority population
Doi Ang Khang - is a mountain in Fang District, northwest of Chiang Mai
Doi Inthanon National Park - Thailand's tallest mountain with beautiful nature and Waterfalls, frost in winter nickname "the roof of Thailand” Chiang Mai Province.
Doi Tung - royal villas and a mountaintop temple with stunning views and (so they say) the Buddha's collarbone
Golden Triangle - a bit of a tourist trap, but the opium museums are worth a visit
Mae Sai - Thailand's northernmost town, day trips to Myanmar
Mae Salong - famous for oolong tea, founded by Chinese Nationalists fleeing after their defeat in the war
Thaton - also spelled "Tha Ton", small village on the banks of the Kok river with good guest houses, nice view
Thungyai-Huai Kha Khaeng Wildlife Sanctuaries - the largest protected area in Southeast Asia, listed as a UNESCO World Heritage Site in 1991
How to get there?
Domestic flight from Bangkok to The main airport in Northern Thailand is Chiang Mai, Chiang Rai, Pai, Phitsanulok, ,and Sukhothai
From Hua-Lamphong railway station Bangkok go to Chiang Mai via Phitsanulok.
From Mo-Chit station Bangkok go to major in Phitsanulok, Chiang Mai and Chiang Rai.
Information more at : http://www.tourismthailand.org