Mount Everest in the context of "Oceanic zone"

The Himalayas, or Himalaya, is a mountain range in Asia separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the Earth's highest peaks, including the highest, Mount Everest. More than 100 peaks exceeding elevations of 7,200 m (23,600 ft) above sea level lie in the Himalayas.

The Himalayas abut on or cross territories of six countries: Nepal, India, China, Bhutan, Pakistan and Afghanistan. The sovereignty of the range in the Kashmir region is disputed among India, Pakistan, and China. The Himalayan range is bordered on the northwest by the Karakoram and Hindu Kush ranges, on the north by the Tibetan Plateau, and on the south by the Indo-Gangetic Plain. Some of the world's major rivers, the Indus, the Ganges, and the Tsangpo–Brahmaputra, rise in the vicinity of the Himalayas, and their combined drainage basin is home to some 600 million people; 53 million people live in the Himalayas. The Himalayas have profoundly shaped the cultures of South Asia and Tibet. Many Himalayan peaks are sacred in Hinduism and Buddhism. The summits of several—Kangchenjunga (from the Indian side), Gangkhar Puensum, Machapuchare, Nanda Devi, and Kailash in the Tibetan Transhimalaya—are off-limits to climbers.

The Great Himalayas (also known as Greater Himalayas, Inner Himalayas, or Himadri) is one of the four parallel sub-ranges of the Himalayas. The core of this part of the Himalayas is composed of granite. It is perennially snowbound. It is the highest in altitude and extends for about 2,300 km (1,400 mi) from northern Pakistan to the Indian state of Arunachal Pradesh, passing through China, India, Nepal, and Bhutan. The sub-range has an average elevation of 6,100 m (20,000 ft) and contains many of the world's tallest peaks, including the eight-thousanders and Mount Everest, the highest peak on Earth. The range is mainly composed of granite rocks with permafrost, and consists of many glaciers, including the Gangotri, Khumbu, and Satopanth Glaciers.

A mountain is an elevated portion of the surface of a planet, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 600 metres (2,000 ft) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges.

Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers.

The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vertical datum).The term elevation is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.

Elevation is not to be confused with the distance from the center of the Earth. Due to the equatorial bulge, the summits of Mount Everest and Chimborazo have, respectively, the largest elevation and the largest geocentric distance.

Tibet (/tɪˈbɛt/ ), Xizang or Hsi-tsang is a region in the western part of East Asia, covering much of the Tibetan Plateau. It is the homeland of the Tibetans. Other ethnic groups also reside on the plateau, including Mongols, the Monpa, the Tamang, the Qiang, the Sherpa, the Lhoba, and since the 20th century, the Han and the Hui. Tibet is the highest region on Earth, with an average elevation of 4,380 m (14,000 ft). Lying within the Himalayas, the highest point in Tibet is Mount Everest – the highest peak on Earth, standing 8,848 m (29,000 ft) above sea level.

The Tibetan Empire emerged in the 7th century. At its height in the 9th century, the Tibetan Empire extended far beyond the Tibetan Plateau, from the Tarim Basin and Pamirs in the west, to Yunnan and Bengal in the southeast. It then collapsed and divided into a variety of territories in the 9th century after the battle of U-Yor (Chinese:伍约之战 Tibetan:དབུ་གྱོར་བཁྲུག་པ་བྱས). Lhasa was central part of Wu Ru (Chinese:伍如 Tibetan: དབུ་རུ), the battle of U-Yor lasted for 12 years in Wu Ru and also marked the end of Wu Ru.

Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China to the north, and India to the south, east, and west, while it is narrowly separated from Bangladesh by the Siliguri Corridor, and from Bhutan by the Indian state of Sikkim. Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten highest mountains, including Mount Everest, the highest point above mean sea level on Earth. Kathmandu is the nation's capital and its largest city. Nepal is a multi-ethnic, multi-lingual, multi-religious, and multi-cultural state, with Nepali as the official language.

The name "Nepal" is first recorded in texts from the Vedic period of the Indian subcontinent, the era in ancient Nepal when Hinduism was founded, the predominant religion of the country. In the middle of the first millennium BC, Gautama Buddha, the founder of Buddhism, was born in Lumbini in southern Nepal. Parts of northern Nepal were intertwined with the culture of Tibet. The centrally located Kathmandu Valley is intertwined with the culture of Indo-Aryans, and was the seat of the prosperous Newar confederacy known as Nepal Mandala. The Himalayan branch of the ancient Silk Road was dominated by the valley's traders. The cosmopolitan region developed distinct traditional art and architecture. By the 18th century, the Gorkha Kingdom achieved the unification of Nepal. The Shah dynasty established the Kingdom of Nepal and later formed an alliance with the British Empire, under its Rana dynasty of premiers. The country was never colonised but served as a buffer state between Imperial China and British India. Parliamentary democracy was introduced in 1951 but was twice suspended by Nepalese monarchs, in 1960 and 2005. The Nepalese Civil War in the 1990s and early 2000s resulted in the establishment of a secular republic in 2008, ending the world's last Hindu monarchy. The Constitution of Nepal, adopted in 2015, affirms the country as a federal parliamentary republic divided into seven provinces. In September 2025, protests against a social media ban and economic inequality caused riots, resulting in casualties and resignation of the prime minister.

The People's Republic of China (PRC) shares land borders with 14 countries (tied with Russia for the most in the world): North Korea, Russia, Mongolia, Kazakhstan, Kyrgyzstan, Tajikistan, Afghanistan, Pakistan, India, Nepal, Bhutan, Myanmar, Laos, and Vietnam, and with two Special administrative regions of China, Hong Kong and Macao. The land borders, counterclockwise from northeast to southwest, are the China–North Korea border, the eastern segment of the China–Russia border, the China–Mongolia border, the western segment of the China–Russia border, the China–Kazakhstan border, the China–Kyrgyzstan border, the China–Tajikistan border, the China–Afghanistan border, the China–Pakistan border, the western segment of the China–India border (the most contested of the Sino-Indian border dispute), the China–Nepal border, the central segment of the China–India border (Sikkim), the China–Bhutan border, the eastern segment of the China–India border, the China–Myanmar border, the China–Laos border, the China–Vietnam border, a 3-kilometre (1.9 mi) internal border with Macau, a Portuguese territory until 1999, and a 30-kilometre (19 mi) internal border with the special administrative region of Hong Kong, which was a British dependency before 1997.

To the west, China has maritime borders with North Korea, Japan and contested limits with Taiwan and other countries in the South China Sea, among other territorial disputes.

Nanga Parbat, known locally as Diamer, is the ninth-highest mountain on Earth with its summit at 8,126 m (26,660 ft) above sea level. Lying immediately southeast of the northernmost bend of the Indus River in the Gilgit-Baltistan region of Pakistan-administered Kashmir, Nanga Parbat is the westernmost major peak of the Himalayas, and thus in the traditional view of the Himalayas as bounded by the Indus and Yarlung Tsangpo/Brahmaputra rivers, it is the western anchor of the entire mountain range.

Nanga Parbat is one of the 14 eight-thousanders. It rises far above its surrounding terrain and has the second-highest prominence among the 100 tallest mountains on Earth only behind Mount Everest. Nanga Parbat is well-known for being an extremely difficult climb, and has earned the nickname Killer Mountain for its high number of climber fatalities and pushing climbers to their limits. According to Guinness World Records, Nanga Parbat is the fastest growing mountain in the world, growing taller at a rate of 7 mm (0.27 in) per year.

The superlative, tallest mountain is often used when what is meant is highest mountain.

The height of a mountain is normally expressed as its altitude above mean sea level. This means Mount Everest is the highest mountain above sea level on earth. But it is not the tallest mountain, either on Earth or off it.

The Alborz (Persian: البرز, pronounced [ʔælˈboɹz] ; also spelt Alburz, Elburz or Elborz) is a mountain range in northern Iran that stretches from the border of Azerbaijan along the western and entire southern coast of the Caspian Sea and finally runs northeast and merges into the smaller Aladagh Mountains and borders in the northeast on the parallel mountain ridge Kopet Dag in the northern parts of Khorasan. All these mountains are part of the much larger Alpide belt. The Alborz range is divided into the Western, Central, and Eastern Alborz Mountains. The Western Alborz Range (usually called the Talysh) runs south-southeastward almost along the western coast of the Caspian Sea. The Central Alborz (the Alborz Mountains in the strictest sense) runs from west to east along the entire southern coast of the Caspian Sea. In contrast, the Eastern Alborz Range runs in a northeasterly direction, toward the northern parts of the Khorasan region, southeast of the Caspian Sea. Mount Damavand, the highest mountain in Iran, measuring 5,610.0 m (18,405.5 ft), is located in the Central Alborz Mountains. Mount Damavand is the 12th most prominent peak in the world and the second most prominent in Asia after Mount Everest.