Warsaw (/ˈwɔːrsɔː/; Polish: Warszawa [varˈʂava] ( listen); see also other names) is the capital and largest city of Poland. The metropolis stands on the Vistula River in east-central Poland and its population is officially estimated at 1.760 million residents within a greater metropolitan area of 3.101 million residents, which makes Warsaw the 9th most-populous capital city in the European Union. The city limits cover 516.9 square kilometres (199.6 sq mi), while the metropolitan area covers 6,100.43 square kilometres (2,355.39 sq mi). Warsaw is an alpha global city, a major international tourist destination and a significant cultural, political and economic hub. With a nominal GDP of $233 billion (PPP), it is the wealthiest capital city in Central and Eastern Europe alongside Berlin. Concurrently, its historical Old Town was designated a UNESCO World Heritage Site.