Castel Sant'Angelo, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

castel sant'angelo rome lazio italy historic site fortress tiber river architecture travel tourism historical landmark green trees sky blue medieval decorations statues riverside ancient rome sightseeing cultural heritage cityscape summer italy attractions riverbank skyline bridges outdoor nature buildings landscape heritage site rome history exploration picturesque scenic view waterfront famous landmarks italian architecture ancient fortress visitor attractions iconic sites cultural sites architectural beauty scenic landscape historical architecture urban exploration travel destinations sightseeing tours local attractions