Can anyone tell me where exactly this last hidden location is? I've checked the wiki, all it says is 'At the very top of the top.' And so I've been sitting at the top platform in the ventilation shaft by the 'Way out' sign and have gone through about 20 spinach so far (fortunately I took 50 with me so I have 30 left) just jumping at the top of the screen and trying to find that stupid spot.
Is it on the right, left? Do I need to jump straight up from somewhere and then move in a specific direction?