The Stairway to Zenithia is a location in Dragon Quest IV.
Located on Central Island south of Gottside, it is an immensely tall tower stretching up towards the heavens. Because it serves as the gateway of sorts to Zenithia, the Hero and his party can only enter if he is wearing the entire set of Zenithia Equipment. It has a number of magically powered elevators, some of the only articles of high technology in the entire game.
The first floor of the Tower has a high encounter rate for King Metal Slimes, allowing for easier grinding for the endgame.
The layout in the remake differs greatly from the original version.