The Peter and Paul Fortress is a historic fortress located on Zayachy Island in St. Petersburg. It was founded by Peter the Great in 1703 and served as a defensive structure during the early years of the city. Today, the fortress is a popular tourist attraction, offering visitors a chance to explore its historic buildings, including the Peter and Paul Cathedral, which houses the tombs of the Russian tsars. The fortress also offers stunning views of the Neva River and the city skyline.