I dont know places either. But if we speak of photography (not about foraging) then you dont have to! Fungi are everywhere here, I can tell you for sure. Parks, trees, street lawns - you name it. A lot of different species, some are less, some are more photo-friendly. (I visit forest myself only during summer vacations, but still have gigabytes of photos - all taken at various SPb locations!) 😎
RE: New mushroom harvest