7. Chiang Rai
Chiang Rai is in Northern Thailand and close to the borders of Laos and Myanmar. The city was founded in 1962 and was the capital of the Mangrai Dynasty. It is famous for its iconic white temple Wat Rong Khun which is actually privately owned and was built by artist Chalermchai Kositpipat using his own money.
8. Ayutthaya
Ayutthaya was founded in 1350 and has in the past been the capital of Thailand. The city is along Chao Phraya River north of Bangkok and is accessible by the train, buses or by tours along the river.