1. This ship is in the centre of Krakow. How?
Looks like Błonia, perhaps it was brought by truck or assembled on site? Marking an aneversiery of the royal ship that used to go to the capital via the Wisła?
(just a complete guess)
Do you put the cheese in the middle, eehhh just for eh fun?
3. What is the old man doing?
He is looking for his marbles?.
He is trying to find water under the ground with sticks?.(probably not, he only has one stick)
Perhaps he is looking for a snail or something that is found under leaves?
He is collecting rubbish?