You can't miss to visit the Walled City founded in 1296 AD in my country, the culturally rich city of Chiang Mai is the longest continuously inhabited settlement from the ancient days of Siam. It's an incredible seen that you will never forget.
Located amidst the rolling foot hills of the Himalayan Mountains 700km north of Bangkok, it could only be reached by an arduous river journey or an elephant back trip until the 1920's, isolation which has helped keep Chiang Mai's distinctive charm intact to this day.
Chiang Mai's historical centre is the Walled City (chiang in Thai, hence Chiang Mai - "New Walled City"). Sections of the wall remain at the gates and corners, but of the rest only the moat remains. Inside Chiang Mai's remaining city walls are more than 30 temples dating back to the founding of the principality, in a combination of Burmese, Sri Lankan and Lanna Thai styles, decorated with beautiful wood carvings, Naga staircases, leonine and angelic guardians, gilded umbrellas and pagodas laced with gold filigree.
The most famous is Doi Suthep, which overlooks the city from a mountainside 13km away.
I love my country, and we have so many incredible places to discover.