Myanmar and Thailand are both referred to as protruded countries. Characterized by most of the regions land mass contained inland and a protruding piece of land which extends out on the Malay Peninsula. The topographical layout consists of mountains in the north and low lying, fertile agricultural land in the south. Both countries have major port cities along river deltas. The largest city in Myanmar, Yangon (Rangoon), lies on the mouth of the Irrawaddy River. Thailand's largest city, Bangkok is on the entrance of the Chao Phraya River.