* A walking tour of the historical center of St. Petersburg introduces tourists to the most famous Orthodox churches of the Northern capital - St. Isaac's Cathedral, Kazan Cathedral and the Church of the Savior on Spilled Blood. Built at different times, they don't look like each other, and each is beautiful in its own way. All three cathedrals are active. On the tour, you will visit three temples, learn interesting, little-known facts from their history, admire their luxurious decorations, and in St. Isaac's Cathedral, if desired, you can climb the colonnade, which offers a breathtaking view of the city.