evidence: The second region, the Kerch Peninsula, thrusts eastward toward the Russian kray (territory) of Krasnodar and consists of low hills rich in iron ore. The mud volcanoes and mineral springs that dot the landscape have given rise to a spa industry that draws both domestic and international tourists. There is steppe vegetation, but large-scale agricultural development has been hindered by the limited availability of suitable soil. Heavier industry is concentrated in the city of Kerch, traditionally a centre of large-scale iron ore mining. A 12-mile- (19-km-) long bridge spans the Kerch Strait, linking Crimea and Russia.