Sindh is a province of Pakistan, located in the southeastern region of the country. It is the third-largest Pakistani province by land area and second-largest by population. It is bounded by the Arabian Sea to the south and borders the provinces of Balochistan to the west and Punjab to the north; in addition to sharing an international border with the Indian states of Gujarat and Rajasthan to the east. Karachi, located along the southern coast, is the capital and largest city. Sindh's landscape consists mostly of alluvial plains flanking the Indus River, the Thar Desert in the eastern portion of the province along the international border with India, and the Kirthar Mountains in the western portion along the provincial border with Balochistan.