Princess Peach's Castle is the castle, situated within the Mushroom Kingdom and is its most prominent landmark. Princess Peach and many Toads, including Toad and Toadsworth, live here. It is recognized by a tall tower, standing in the center of the castle and is supported by four towers, along the outside walls in most games.
It is the domicile of the Koopa villain Bowser and the base of operations for his army. The castle is situated in the Valley of Bowser World and is characteristically an important base, from which the Koopa King formulates his plans and summons his minions to take over the Mushroom Kingdom and carry out the capture of Princess Peach.
Rosalina's Star Palace
Rosalina's Star Palace is her temporary home on the Earth. One century ago she and the Lumas went to her home to take a nap in her favourite sleeping nook, as she does every hundred years. But after that, she found that the house is abandoned and completely destroyed. Rosalina built the palace above the valley, to see if her family is going to come back. After years of waiting she left the palace without any hope that they'll return again. This Century she came again to see if her family have returned, but her observatory was hit by Kamek's gigantic orb of power.