Loei, is one of the most sparsely populated provinces (changwat) of Thailand and lies in the Isan region of upper northeastern Thailand. Neighboring provinces are Nong Khai, Udon Thani, Nongbua Lamphu, Khon Kaen, Phetchabun, Phitsanulok. In the north it borders Xaignabouli and Vientiane Province of Laos.
Uttaradit is one of Thailand's seventy-six provinces (changwat), lies in upper northern Thailand. Neighboring provinces are Phitsanulok, Sukhothai, Phrae and Nan. To the east it borders Xaignabouli of Laos. Uttaradit is 488 km north of Bangkok, and 238 km southeast of Chiang Mai.
Northern Thailand is geographically characterised by several mountain ranges, which continue from the Shan Hills in bordering Myanmar to Laos, and the river valleys which cut through them. Though like most of Thailand, it has a tropical savanna climate, its relatively high elevation and latitude contribute to more pronounced seasonal temperature variation, with cooler winters than the other regions. Historically it is related to the Lanna Kingdom and its culture.
The Dângrêk Range, meaning 'carrying-pole mountains' in Khmer, is a mountain range forming a natural border between Cambodia and Thailand.
Thái Nguyên is a province in the Northeast region of Vietnam. It is a mountainous, midland province with a natural land area of 3534.45 square kilometres and a population of 1,149,100 as of 2008. Its multi-ethnic society is composed of eight ethnic groups.
Utricularia phusoidaoensis is a terrestrial lithophytic carnivorous plant that belongs to the genus Utricularia. It is endemic to the northern Thailand province of Phitsanulok on Phu Soi Dao, where it is only known from the type locality. It grows on wet cliffs at altitudes around 2,000 m (6,562 ft). It is related to U. garrettii, another species endemic to Thailand that shares a similar seed morphology. Utricularia phusoidaoensis is easily distinguished by its purple 4-6-lobed corolla, reniform leaves, and the staghorn-like trap appendages. It has been found growing in the presence of U. spinomarginata. It was first formally described by Piyakaset Suksathan and John Adrian Naicker Parnell in 2010 from collections made by Suksathan in 2007.
Utricularia spinomarginata is a terrestrial lithophytic carnivorous plant that belongs to the genus Utricularia. It is endemic to the northern Thailand province of Phitsanulok on Phu Soi Dao, where it is only known from the type locality. It grows on wet cliffs at altitudes around 2,000 m (6,562 ft). Utricularia spinomarginata is easily distinguished from other members of section Phyllaria by its deeply dissected yellow-white to pink-white 5-lobed corollas and the marginal spine-like hairs on the obovoid seeds. It has been found growing in the presence of U. phusoidaoensis. It was first formally described by Piyakaset Suksathan and John Adrian Naicker Parnell in 2010 from collections made by Suksathan in 2007.
Phu Ruea, is a 1365 m high mountain in Loei Province, Thailand. It is in Phu Ruea District. This mountain is part of the Phetchabun Mountains, a massif forming a natural boundary between northern Thailand and Isan. The peak rises seven kilometers north of Highway 203, between Loei town and Phetchabun. The name of the mountain comes from the fact that it looks like a boat upside down from certain angles.
The Luang Prabang Range, named after Luang Prabang, is a mountain range straddling northwestern Laos and Northern Thailand. Most of the range is located in Sainyabuli Province (Laos), as well as Nan and Uttaradit Provinces (Thailand), with small parts in Phitsanulok and Loei Provinces. Several rivers such as the Nan, Pua and Wa river, have their source in this range. Phu Fa waterfall, the biggest and the tallest waterfall in Nan Province, is also located in these mountains. This range is part of the Luang Prabang montane rain forests ecoregion.
Phu Soi Dao National Park, named after 2,120 m high Phu Soi Dao mountain, is a protected area at the southern end of the Luang Prabang Range in the Thai/Lao border area, on the Thai side of the range. It is located in Nam Pat District of Uttaradit Province and Chat Trakan District of Phitsanulok Province. The park was established as Thailand's 109th national park in 2008.
Doi Phu Kha Thai: ดอยภูคา, is a mountain in Southeast Asia, part of the Luang Prabang Range (ทิวเขาหลวงพระบาง).
Phu Sang National Park is a national park in Northern Thailand.
Phu Chi Fa, also Phu Chee Fah, is a mountain area and national forest park in Thailand. It is located at the northeastern end of the Phi Pan Nam Range, 12 km to the southwest of Doi Pha Tang at the eastern edge of Thoeng District, Chiang Rai Province.
Ban Bo Sane is a village in Sainyabuli Province, Laos. It is located not far from the border with Thailand. To the northwest is the peak of Phu Soi Dao.
Khao Khitchakut National Park is a national park in Chanthaburi Province, Thailand. The park is located in the Soi Dao Mountains, the Thai part of the much larger Cardamom Mountains, and is home to waterfalls and forests. The venerated Buddha footprint is also within the park premises.
Khao Soi Dao Wildlife Sanctuary is a wildlife sanctuary in Thailand's Chanthaburi Province. It covers the area around Khao Soi Dao Tai and Khao Soi Dao Nuea, the two highest peaks in the Chanthaburi Mountains of Eastern Thailand, which form part of the much larger Cardamom Mountains extending well into Cambodia.
The Chanthaburi Mountains is a mountain range in Eastern Thailand. It forms the watershed between the Bang Pakong River basin to its north and several short rivers draining into the Gulf of Thailand.
