The geography and climate of Pakistan are extremely diverse, and the country is home to a wide variety of wildlife. Pakistan covers an area of 881,913 km2 (340,509 sq mi), approximately equal to the combined land areas of France and the United Kingdom. It is the 33rd-largest nation by total area. Pakistan has a 1,046 km (650 mi) coastline along the Arabian Sea and the Gulf of Oman in the south and land borders of 6,774 km (4,209 mi) in total: 2,430 km (1,510 mi) with Afghanistan, 523 km (325 mi) with China, 2,912 km (1,809 mi) with India and 909 km (565 mi) with Iran. It shares a marine border with Oman, and is separated from Tajikistan by the cold, narrow Wakhan Corridor. Pakistan occupies a geopolitically important location at the crossroads of South Asia, the Middle East, and Central Asia.
Geologically, Pakistan is located in the Indus–Tsangpo Suture Zone and overlaps the Indian tectonic plate in its Sindh and Punjab provinces; Balochistan and most of Khyber Pakhtunkhwa are within the Eurasian plate, mainly on the Iranian plateau. Gilgit–Baltistan and Azad Kashmir lie along the edge of the Indian plate and hence are prone to violent earthquakes. Ranging from the coastal areas of the south to the glaciated mountains of the north, Pakistan's landscapes vary from plains to deserts, forests, hills, and plateaus.
Pakistan is divided into three major geographic areas: the northern highlands, the Indus River plain, and the Balochistan Plateau. The northern highlands contain the Karakoram, Hindu Kush, and Pamir mountain ranges, which contain some of the world's highest peaks, including five of the fourteen eight-thousanders (mountain peaks over 8,000 metres or 26,250 feet), which attract adventurers and mountaineers from all over the world, notably K2 (8,611 m or 28,251 ft) and Nanga Parbat (8,126 m or 26,660 ft). The Balochistan Plateau lies in the west and the Thar Desert in the east. The 1,609 km (1,000 mi) Indus River and its tributaries flow through the country from the Kashmir region to the Arabian Sea. There is an expanse of alluvial plains along it in the Punjab and Sindh.
The climate varies from tropical to temperate, with arid conditions in the coastal south. There is a monsoon season and a dry season with significantly less rainfall or none at all. There are four distinct seasons in Pakistan: a cool, dry winter from December through February; a hot, dry spring from March through May; the summer rainy season, or southwest monsoon period, from June through September; and the retreating monsoon period of October and November. Rainfall varies greatly from year to year.