Lviv High Castle
If You like to climb the mountains You can add this place also to you list. It is better to visit during sunset. We have beautiful view over Lviv here.
Lviv's High Castle park is the most iconic natural landmark of the city, and indeed the entire region (spoiler alert - there is no actual castle up there). Prepare to hike up some stairs and ramps, but it's undoubtedly worth the trip! Skip it if the visibility is low (fog, heavy snowfall, etc)