There is a small garden next to a pond in KK Hospital. Though it can't compare with BG, I still feel that there is a wealth of insects, plants, fishes and tortoises around this place.
Come to think of it, it is due to newbie's experience, I had the Vitacon 2x converter (actually only about 1.3x) and I did not zoom in all the way. This is vignetting.
You have sharp eyes, my friend. Thanks for your comments.