The flower market. In season, you can get 50 tulips for
10G. That's cheap, but 50 is too many. In other
seasons, they have other flowers (lots of sunflowers
in the summer).
The flower market "floats" (not really - most of the buildings are built on top of something). It gets a lot of press as something to visit, and while it's very colorful (there are lots of flowers), I didn't think it was special.