Visit to the Peter and Paul Fortress. Located on a small island opposite the winter palace and dominating three branches of the Neva River, the Fortress was intended to protect the city from a naval assault. It was the city’s first building and is considered the foundation of St. Petersburg, while the tsars also used it as a political prison for their main opponents. Now it is a museum and one of the best spots in the city to enjoy magnificent panoramic views of the Neva’s southern bank. One of the guns on the top of its bulwarks is even fired every day at noon, and what was initially a small wooden church built inside the big fortress was eventually expanded and improved on, becoming the current cathedral, both hits with visiting tourists. There we will take in the graves of all the tsars of the Romanov dynasty and their families, including the grave of Peter the Great, founder of the city, and those of Nicholas II and his family, killed during the Bolshevik revolution of 1918. Their remains were buried in the cathedral in 1998.