The city has great food, budget accommodation, stunning temples and is a good base for nearby excursions. In the old city’s southwest corner, Marigold Lanna ($50 USD/night) and the stunning pool at Smile Lanna Hotel ($82/ USD night) are favorites. Climb the 306 steps to the mountain-top temple of Wat Phra That Doi Suthep, which is a short trip outside of the city. I love Khao Yai because unlike many of Thailand’s more remote national parks, it’s accessible by public transportation. Today, sprawling ruins—remnants of towering temples, including its crown jewel and Angkor Wat look-alike, Wat Chaiwatthanaram—comprise the UNESCO World Heritage Site (one of eight in Thailand). In its heyday, between the 14th and 18th centuries, it was one of the world’s largest and most advanced cities. In order to secure independence, it sought to pit one great power against the others so that it would be dominated by none. The powers of the king are limited by the constitution and he is primarily a symbolic figurehead. Most recently, the military junta self-titled as the National Council for Peace and Order ruled the country between 2014 and 2019. Thailand has had 20 constitutions and charters since 1932, including the latest and current 2017 constitution. The population of elephants, the national symbol, has fallen from 100,000 in 1850 to an estimated 2,000. Thailand has a mediocre but improving performance in the global Environmental Performance Index, with an overall ranking of 91 out of 180 countries in 2016. Rice is the most important crop, and Thailand had long been the world's leading exporter of rice, until recently falling behind both India and Vietnam. The country is popular for the growing practice of sex reassignment surgery and cosmetic surgery. Thailand ranks as the worlds fifth largest medical tourism destination in spending, according to the World Travel and Tourism Council, attracting over 2.5 million visitors in 2018, and is number one in Asia. Western tourists visit Bangkok and surrounding areas, as well as the southern beaches and islands. In the 21 century, Thailand has experienced political conflict between supporters and opponents of Prime Minister Thaksin Shinawatra, leading to the 2006 and 2014 coup d'états. King Rama I established the Rattanakosin Kingdom and moved the capital to Bangkok in 1782. The Sukhothai Kingdom is regarded as the beginning of Thai history, while the Ayutthaya Kingdom, founded in 1350 CE, became a regional power replacing the Khmer Empire. Thailand has a population of nearly 66 million people and covers an area of approximately 513,115 km2 (198,115 sq mi). Thailand,[iii] officially the Kingdom of Thailand,[iv] and formerly known as Siam,[v] is a country located in Mainland Southeast Asia. Klook offers day trips to most surrounding islands with free pickup. Phuket, like Krabi, is a good transport hub to other islands. Transport between the main town and other beaches is pricey. While the town of Ao Naug isn’t the nicest, it’s a great place to grab a boat over to Railay, a tiny picturesque white sandy beach village accessible only by sea. You can fly to Ko Samui from Bangkok easily or other cities internationally. (The only ones I like are the Similian Islands and Khao Lak.) Avoid the rainy season because beaches will be filled with trash and debris, including plastic. As of 2020[update], Thailand was ranked 89th out of 100 countries globally for English proficiency. Students in ethnic minority areas score consistently lower in standardised national and international tests. Thailand has the second highest number of English-medium private international schools in Southeast Asian Nations. Thai universities' research output is still relatively low, even though the country's journal publications increased by 20% between 2011 and 2016. Phuket, Krabi, Ranong, Phang Nga and Trang, and their islands, all lay along the coasts of the Andaman Sea.[citation needed] The centre of the country is dominated by the predominantly flat Chao Phraya River valley, which runs into the Gulf of Thailand. The north of the country is the mountainous area of the Thai highlands, with the highest point being Doi Inthanon in the Thanon Thong Chai Range at 2,565 metres (8,415 ft) above sea level. Coal-fired power plants produce an additional 20% of electricity, with the remainder coming from biomass, hydro, and biogas. This means the country uses about twice as much biocapacity as it contains, resulting in a deficit. Bank of Thailand reported that during 2006–16, Thailand's top 5% largest companies had 85% of all corporate revenue in the nation, and only 6% of the country's companies were in export industries, which made up 60% of the country's GDP. However, the country's educational infrastructure was still underprepared for online teaching, as smaller and more remote schools were particularly hindered by COVID-19 restrictions. The country is also one of the few that still mandates uniform up to the university years, which is still a subject of ongoing debate. Education is compulsory up to and including age 14, while the government is mandated to provide free education through to age 17. Thailand has the second-largest number of Buddhists in the world after China. The country's most prevalent religion is Theravada Buddhism, which is an integral part of Thai identity and culture. Numerous tribal languages are also spoken, including many Austroasiatic languages such as Mon, Khmer, Lawa and Mlabri; Austronesian languages such as Cham, Moken and Urak Lawoi'; Sino-Tibetan languages like Akha and Karen; and other Tai languages such as Phu Thai, and Saek.