is the largest resort city in Russia. The city is situated on the Sochi River, along the Black Sea in Southern Russia, with a population of 443,562 residents, up to 600,000 residents in the urban area. The city proper covers an area of 176.77 square kilometers (68.25 sq mi), while the Greater Sochi Area covers over 3,502 square kilometers (1,352 sq mi). Sochi stretches across 145 kilometers (90 mi), and is the longest city in Europe, the fifth-largest city in the Southern Federal District, the second-largest city in Krasnodar Krai, and the sixth-largest city on the Black Sea. Being a part of the Caucasian Riviera, it is one of the very few places in Russia with a subtropical climate, with warm to hot summers and mild winters.