Dome of St. Peter's, Vatican City
Sightseeing in Italy picture - I took this shot of the dome while standing on the roof of the basilica. Entrance to the dome is from the left aisle of the church. An elevator takes you as far as the first terrace above the nave. From here you have fine view of the Vatican City and beyond. If you want to climb beyond this level, you must do so on an endless and precarious one-way staircase. The reward for this grueling ascent is a spectacular panoramic view of Vatican City, Rome, and beyond.