personal highlights

1. Fortress: original citadel from 1703, when the city was built
2. Emperors: burial ground for the Russian Emperor's family
3. Museum: today it's a tourist attraction with a history museum
4. Peter and Paul: too many places are named after these two apostles

image sources

1. hangman on his scaffold
2. fortification towards Neva River
3. Asian tourists everywhere
4. modern artillery exhibition
5. main building made of bricks