Moscow is the capital of the Russian Federation and its most famous attraction, the Kremlin, is full of historic significance. Architecture from the Russian Empire can still be seen in the city and signs of wealth abound. Moscow was once the capital of the former Soviet Union (USSR) prior to the end of the Cold War. Located on the Gulf of Finland and the Baltic Sea, St. Petersburg is one of the most attractive cities in Russia and is a UNESCO World Heritage Site. Founded in 1703 by Tsar Peter the Great, St Petersburg is the second largest city in Russia and has stunning architecture and rich historical significance.