This nations's northern border is formed by the Mekong River.
In this nation, the Khorat Plateau creates eastern highlands. The Chao Phraya River flows through this nation's largest city and into this country's namesake gulf. This nations's northern border is formed by the Mekong River. This nation's major cities include Chiang Mai and Phuket, and it is bordered by Myanmar, Cambodia, Laos, and Malaysia. For 10 points, name this Southeast Asian nation, with capital at Bangkok.
In this nation, the Khorat Plateau creates eastern highlands.
Kingdom of {Thailand} or {Ratcha Anachak Thai} or {Prathet Thai}