This isn’t the best set of photos, primarily because there’s only one photo and it’s not that close-up. Anyway, that aside, this is the People’s Friendship Arch which I didn’t manage to get time to walk to.
It was opened to mark the 60th anniversary of the USSR and also the 1,500th anniversary of Kiev, although the emphasis appears to have been on the former at the time. It was designed by Oleksandr Skoblikov and took four years to complete. Even from afar it does look quite impressive.