Bangkok is the capital and most populous city of Thailand. It is known in Thai as Krung Thep Maha Nakhon or simply Krung Thep. The city occupies 1,568.7 square kilometres (605.7 sq mi) in the Chao Phraya River delta in central Thailand, and has a population of over eight million, or 12.6 percent of the country's population. Over fourteen million people (22.2 percent) lived within the surrounding Bangkok Metropolitan Region at the 2010 census, making Bangkok the nation's primate city, significantly dwarfing Thailand's other urban centres in terms of importance.

Kompong Som (Sihanoukville)

Nha Trang is a coastal city and capital of Khánh Hòa Province, on the South Central Coast of Vietnam. It is bounded on the north by Ninh Hoà district, on the south by Cam Ranh town and on the west by Diên Khánh District. The city has about 392,000 inhabitants, a number that is projected to increase to 560,000 by 2015 and 630,000 inhabitants by 2025. An area of 12.87 square kilometres (4.97 sq mi) of the western communes of Diên An and Diên Toàn is planned to be merged into Nha Trang which will make its new area 265.47 square kilometres (102.50 sq mi) based on the approval of the Prime Minister of Vietnam in September 2012.

Nha Trang is well known for its beaches and scuba diving and has developed into a popular destination for international tourists, attracting large numbers of backpackers, as well as more affluent travelers on the south-east Asia circuit; it is already very popular with Vietnamese tourists, with Nha Trang Bay widely considered as among the world's most beautiful bays. Tourists are welcomed to participate in the Sea Festival, held biennially. Nha Trang was the site of the Miss Universe 2008 Pageant on July 14, 2008 and Miss Earth 2010 was held on December 4, 2010. It was also the site for the April 14, 2015 season 8 finale of Face Off. Nha Trang was approved to host the 2016 Asian Beach Games.

Historically, the city was known as Kauthara under the Champa. The city is still home to the famous Po Nagar Tower built by the Champa. Being a coastal city, Nha Trang is a centre for marine science based at the Nha Trang Oceanography Institute. The Hon Mun marine protected area is one of four first marine protected areas in the world admitted by the IUCN.

Puerto Princesa is a city on the island of Palawan in the Philippines, widely known for one of the natural wonders of the world — the Puerto Princesa Underground River, a UNESCO World Heritage Site. This subterranean system of caves and rivers, passing through limestone formations, attracts travelers from around the globe with the opportunity to ride a boat along the river and see stalactites, stalagmites, and a unique ecosystem. The city also serves as a starting point for exploring the breathtaking nature of Palawan: tropical forests, coastlines, and nature reserves.

In addition to its natural attractions, Puerto Princesa is known for its clean streets, friendly atmosphere, and well-developed tourist infrastructure. Here you can taste fresh seafood, visit night markets, or go on island-hopping tours in Honda Bay. The city actively promotes ecotourism, maintaining a balance between development and environmental preservation. For travelers seeking a combination of adventure, relaxation, and immersion in Filipino culture, Puerto Princesa is becoming an increasingly attractive destination.

Kota Kinabalu, formerly known as Jesselton, is the capital of Sabah state and the Kota Kinabalu District in Malaysia. Located on the northwest coast of Borneo facing the South China Sea, the city is near the Tunku Abdul Rahman National Park and Mount Kinabalu, which inspired its name. The metropolitan area has a population of over 600,000.

In the 15th century, the area was influenced by the Bruneian Empire. In the 19th century, the British North Borneo Company established a settlement called Jesselton, which was heavily damaged during World War II. After the war, it became the capital of North Borneo and was renamed Kota Kinabalu in 1967. The city gained official city status in 2000.

Today, Kota Kinabalu is a major industrial and tourist hub in East Malaysia and a popular gateway for travelers visiting Sabah and Borneo. Its rapid growth is driven by tourism and economic development.