The whole of Hoenn was just so awesome, and I am bad at choosing among great things.
But right now, just at this moment, I feel like being in Either Mossdeep or Evergrande City, specially over at some cave, sitting and looking at the panoramic view of the water, the waterfall, the huge green grass fields, and forests. Awesome feeling runs through my veins then!
Actually, Evergrande for training, and Mosdeep because back then I thought that the Rocket would actually be active one day, lol.