This greenhouse is known to some people as the Rockerfeller Park Greenhouse, and some GPS devices have it listed under that name. But it is most definitely owned by the City of Cleveland, so the City of Cleveland Greenhouse works as well.
The best part of this greenhouse is that it is free, unlike the non-free Cleveland Botanical Garden. I've only come here in the winter to see the poinsettia displays, but I love being treated to other kinds of nature in the tropical rooms and the cactus room. There are benches and even a few picnic tables scattered about, so one could bring a book or a snack and relax in the lush atmosphere. Sure, it's not as fancy as the botanical garden, but it is free and peaceful.
Readers of previous reviews might be concerned about the fish in the two tanks in the entryway. Today the ones in the tank to the right of the door were swimming with vigor, and the ones in the tank to the left of the door were chill. But they look well cared for nevertheless!