I have only seen the parrots one time. But there are many birds chirping all day long. Many neighbors are proud and talk to the visitors about their neighborhood, garden, and lifestyle. During the walk, you will see monuments and statues. You will have a great view of the bay and it feels like your right above it, which you are.
Walk up and down this stairway 3 times. I promise you that even if you are in great shape, you are going to feel it. There is nothing wrong with a treadmill, but it seems to me that the Filbert and Greenwich steps are harder, yet funner, and they add a peaceful, tranquil, and spiritual component to it.