Despite the name, the Union Bay "Natural" Area is more reconstructed than natural. It's a large open space constructed over what used to be a dump. They've done a good job. There are lots of trails and ponds, and you can walk right up to the shore of the lake. I've often watched turtles sunning themselves on logs from this spot. I've never seen a beaver, but there's lots of evidence of their activity -- to the point that a lot of trees have been wrapped in a sort of fencing around the base to prevent the beavers from cutting them down.
If you're driving to UBNA, the best place to park is at the Center for Urban Horticulture (turn onto Mary Gates Memorial Drive from the 5 Corners intersection). There's a good amount of free parking there, and when the visitor center is open there are restrooms available inside. Otherwise there aren't any restrooms in the park itself (I don't remember any porta-potties either although there might have been one near the sports fields).
This is a great place to watch birds, and if you follow the trail from the Center for Urban Horticulture, there's a board where people have listed unusual bird species that they've seen that day or in the past few days. I've gotten quite close to herons -- they seem to love the ponds here. I've also seen plenty of bald eagles (including juveniles) and in the spring, the trilling call of the red-winged blackbird is everywhere. I've also seen lots of garter snakes!
Unfortunately, you can't totally forget the site's past. On several of the trails, I've seen a weird oily substance oozing up, and if you follow the stream that runs through the site, you can see bubbles of a mystery gas coming up through the bottom. Also, if there are games going on in the sports fields nearby, they have a tendency to blare their music and sports commentary really loudly, which detracts from the "natural" feeling of the area.
Overall, though, I think it's a good place to go for walks and watch birds and other wildlife, and it's inspiring how well the space has been restored. read more