Rotterdam is the second-largest city in the Netherlands and the largest port in Europe. Starting as a dam on the Rotte river, Rotterdam has grown into a major international commercial centre. Its strategic location at the Rhine-Meuse-Scheldt delta on the North Sea and at the heart of a massive rail, road, air and inland waterway distribution system extending throughout Europe means that Rotterdam can rightly be called the gateway to Europe. Located in the Province of South Holland, Rotterdam is in the west of the Netherlands and at the south of the Randstad. The population of the city proper was 603,425 in March 2010. The population of the greater Rotterdam area, called "Rotterdam-Rijnmond" or just "Rijnmond", is around 1.3 million people. Rotterdam is one of Europe's most vibrant and multicultural cities.