Hi Nerys, pics are in St Petersburg Central Naval Museum, about 60M from the waterway at the entrance (see GE view) see also distance to Aurora on other GE view (red line)- about 3km as the crow flies. A few other ships I found as well which looked interesting. The frigate 'Grace' (БлаГОДаТЬ, - as it seems to be commonly reported) although it seems to be spelt differently on the ship (БааГОДаТЬ) which doesn't seem to translate ? (perhaps they've cocked it up ? ) It's a recently renovated restaurant ship from what I can find.
The other strange looking 'sailing ship' seems to have a fitness centre at the stern, something else in the centre and a restaurant in the bow. It's quite large, being around 230ftx40ft. (may be a recent build)? The other smaller more modern white Schooner? (ЮНЫЙ БАЛТИЕЦ) is the 'Young Baltics',- a sail training vessel (1980) The Ice breaker is the 'Krasin' КРАСИН) looks like a museum ship. The Aurora looks to be beautifully preserved for a ship of its age! The sign on the gangway says something about great latin fleet? -can't get a good view of the words. You could spend forever looking at historical stuff round Russia, - the sheer amount of interesting boats, buildings, and machinery is endless.!
The Russians are certainly brilliant at preserving their history, cost seems no barrier! - us - not so much😴.
Wondered if the third to last pic is what you were thinking of re lighthouses? -it's the entrance to the Admiralty building opposite the winter palace. Haven't found anything else resembling lighthouse type pillars,- maybe they have been moved elsewhere? Last 2 pics are of their local model pond near the water (joking LOL )- lovely,!- pipes are probably water for the big flash buildings on the 'islands', (probably can't afford to bury them yet!)😁