3. Oreshek FortressShlisselburg Shlisselburg is a town in Kirovsky District of Leningrad Oblast, Russia, located at the head of the Neva River on Lake Ladoga, 35 kilometers east of St. Petersburg. From 1944 to 1992, it was known as Petrokrepost . Population: 13,170 ; 12,401 ; 12,589 .The fortress and the town center are UNESCO World Heritage Sites. From Wikipedia, the free encyclopedia.
4. Pavlovsk Palace and ParkPavlovsk Pavlovsk Palace is an 18th-century Russian Imperial residence built by the order of Catherine the Great for her son, Grand Duke Paul, in Pavlovsk, within Saint Petersburg. After his death, it became the home of his widow, Maria Feodorovna. The palace and the large English garden surrounding it are now a Russian state museum and public park. From Wikipedia, the free encyclopedia.