Relatively small. Price is paired with the botanical gardens which was a cold experience in November.
The exhibits are interesting once you get in, lots of insects that are either dead or recreations to see. A good amount of live ones too that will make you cringe to look at. Huge Spiders, stick bugs, Beetles, a cool ant exhibit.
If you like bugs you should check this out. If you have to choose biodome or insectarium/botanical gardens, go with the bio dome.