Kazakhstan is by far the largest of the Central Asian states within the proposed South-Central Asian Union. It has borders with Russia, China, and the Central Asian countries of Kyrgyzstan, Uzbekistan, and Turkmenistan. Kazakhstan is the world’s ninth biggest country by size, and it is more than twice the size of the other Central Asian states combined. Its lack of significant historical sites and endless featureless steppe have put many off Kazakhstan, while many still are captivated by the emptiness and mystery of this Goliath state. Kazakhstan is officially a democratic, secular, unitary, constitutional republic with a diverse cultural heritage. Kazakhstan shares borders with Russia, China, Kyrgyzstan, Uzbekistan, and Turkmenistan, and also adjoins a large part of the Caspian Sea. The terrain of Kazakhstan includes flatlands, steppe, taiga, rock canyons, hills, deltas, snow-capped mountains, and deserts. Kazakhstan has an estimated 18.3 million people as of 2018. Given its large land area, its population density is among the lowest, at less than 6 people per square kilometre (15 people per sq mi). The capital is Astana, where it was moved in 1997 from Almaty, the country’s largest city.