From Zelda Legends Wiki
The tower, built by Ganon, out of which he runs his evil schemes. There have been at least three of these towers: in ALttP, on top of the mountain in the Dark World; in OoT, in place of Hyrule Castle (destroyed when Link defeated Ganondorf); and in TWW, on top of the mountain next to Hyrule Castle.
A Link to the Past
| Location: Death Mountain in the Dark World|
Treasures: Red Mail
Mini-boss(es): 6 Armos Knights, 3 Lanmolas, Moldorm
Enemies: Stalfos, Bari, Daira, Taurus, Skull Wizzrobe, Wizzrobe, Goriya, Rocklops, Helmasaur, Moldorm, Hardhat Beetle, Gibdo, Floormaster