Brahmaputra River in the context of "Himalayas"

A transboundary river is a river that crosses at least one political border, either a border within a state or an international boundary. Bangladesh has the highest number of these rivers, with at least 58 major rivers that enter the country from the Republic of India, including two of the world's largest rivers, the Brahmaputra and the Ganges. The Naf River is the only river that flows via Bangladesh into Myanmar.

The hydrologic and political effects of rivers that cross significant boundaries are enormous. Rivers have positive effects in that they carry a significant amount of sediment, which aids in building land in estuarine regions. However, this sediment raises the height of riverbeds, thereby causing flooding. International conventions governing water sharing have led to complex political disputes.

The Ganges (/ˈɡændʒiːz/ GAN-jeez; in India: Ganga, /ˈɡʌŋɡɑː/ GUNG-ah; in Bangladesh: Padma, /ˈpʌdmə/ PUD-mə) is a trans-boundary river of Asia which flows through India and Bangladesh. The 2,525-kilometre-long (1,569 mi) river rises in the western Himalayas in the Indian state of Uttarakhand. It flows south and east through the Gangetic plain of North India, receiving the right-bank tributary, the Yamuna, which also rises in the western Indian Himalayas, and several left-bank tributaries from Nepal that account for the bulk of its flow. In West Bengal, India, a feeder canal taking off from its right bank diverts 50% of its flow southwards, artificially connecting it to the Hooghly River. The Ganges continues into Bangladesh, its name changing to the Padma. It is then joined by the Jamuna, the lower stream of the Brahmaputra, and eventually the Meghna, forming the major estuary of the Ganges Delta, and emptying into the Bay of Bengal. The Ganges–Brahmaputra–Meghna system is the second-largest river on earth by discharge.

The main stem of the Ganges begins at the town of Devprayag, at the confluence of the Alaknanda, which is the source stream in hydrology on account of its greater length, and the Bhagirathi, which is considered the source stream in Hindu mythology.

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.

Samudragupta (Gupta script: Sa-mu-dra-gu-pta; 318–375) was the second emperor of the Gupta Empire of ancient India. As a son of the Gupta emperor Chandragupta I and the Licchavi princess Kumaradevi, he inherited the kingdom and transformed it into a vast empire through his military campaigns. His reign was marked by political expansion, administrative efficiency, and cultural patronage, particularly of Sanskrit literature and Vaishnavite Hindu rituals. Samudragupta’s legacy as a warrior, administrator, and benefactor of scholars contributed to the golden age of India.

The Allahabad Pillar inscription, a prashasti (eulogy) composed by his courtier Harisena, credits him with extensive military conquests. It suggests that he defeated several kings of northern India, and annexed their territories into his empire. He also marched along the south-eastern coast of India, advancing as far south as Kanchipuram in the Pallava kingdom. In addition, he subjugated several frontier kingdoms and tribal oligarchies. At the height of his power, his empire under his direct control extended from Ravi River in the west (present-day Punjab) to the Brahmaputra River in the east (present-day Assam), and from the Himalayan foothills in the north to central India in the south-west; several rulers along the south-eastern coast were also his tributaries. The inscription also states that many neighbouring rulers tried to please him, which probably refers to his friendly relations with them.

Mount Kailash (also Kailasa, Gang Tise and Gang Rinpoche or Kangrinboqê) is a mountain in Ngari Prefecture, Tibet Autonomous Region of China. It lies in the Gangdise Shan mountain range of the Transhimalaya, in the western part of the Tibetan Plateau. The peak of Mount Kailash is located at an elevation of 6,638 m (21,778 ft), near the western trijunction between China, India and Nepal.

Mount Kailash is located close to Manasarovar and Rakshastal lakes. The sources of four rivers: Indus, Sutlej, Brahmaputra, and Ghaghara lie in the vicinity of the region. Mount Kailash is sacred in Bon, Buddhism, Hinduism, and Jainism. People from China, India, Nepal, and other countries in the region undertake a pilgrimage to the mountain. The pilgrimage generally involves trekking towards Lake Manasarovar and a circumambulation of Mount Kailash.

The Western Himalayas are the western half of the Himalayas, in northwestern India and northern Pakistan. Four of the five tributaries of the Indus River in Punjab (Beas, Chenab, Jhelum, and Ravi) rise in the Western Himalayas; while the fifth, the Sutlej cuts through the range after rising in Tibet.

Included within the Western Himalayas are the Zanskar Range, the Pir Panjal Range, and the Dhauladhar Range, and western parts of the Sivalik Range and the Great Himalayas. The highest point is Nanga Parbat (26,660 feet or 8,126 metres), at the northwestern end of the region. It is part of the Himalayan biodiversity hotspot.