Russian cuisine consists mainly of five staple foods - potatoes, bread, eggs, meat like pork and beef, and butter. Popular Russian beverages include vodka, berry drinks called mors, and tea with sugar and lemon. Some tourist attractions in Russia are the Russian State Library with over 42 million articles, Red Square, and the Alexander Gardens within the Kremlin walls. Russia's national sport is soccer and it has produced many hockey stars in the NHL. The official language is Russian but there are also 27 unofficial regional languages spoken. The currency used is the Russian ruble, with current exchange rates listed against the Canadian dollar, US dollar, euro, and British pound.