Not really an 'amusement park' as much as a stage with boring performances intened to entertain six year olds, plus some adjoining mushroom houses where not much goes on. Go here if you need to have done it just because it's so infamous and weird (earning it one bonus star), but otherwise don't bother; the adjoining Butterfly valley is also a sham (all the butterflies are dead...)

The amazing thing is, if you study at a university and are really (un)lucky, you might actuaally get to go here on a school trip. Prepare for wierdness and awkwardness.