Tower of Hera (A Link to the Past)

The Tower of Hera, or "Mountain Tower", is the third dungeon in the Light World in A Link to the Past. It is located at the top of Death Mountain; in order to climb Death Mountain and thus gain access to the Tower, Link must use the Power Glove  previously obtained from the Desert Palace. Link must also make a brief trip into Dark  World and escape using the Magic Mirror he obtained  from the Old Man  in order to get to the other side of Spectacle Rock.

Concept
The dungeon is larger in size than the first two encountered in the game. It has numerous floors, and features new enemies. It's also the first time that Link encounters teleporters which take him into other parts of the dungeon. Finally, holes leading to lower floors also debut here, and their positions in the floor may change when certain special switches are pressed (this is the only way to get the main treasure of the dungeon, the Moon Pearl.) The boss is Moldorm, which is fought atop a perch surrounded by holes. Should Link fall into a hole, he will find himself on the previous floor, and he will have to begin the battle again. After defeating this boss, Link receives a Heart Container and the Pendant of Wisdom.

The Dark World counterpart of the Tower of Hera is Ganon's Tower.

Trivia

 * The Tower of Hera is named after the famous ancient Greek Goddess, Hera. Hera was the wife of Zeus, the King of the Gods, and is rumored that she lived in a beautiful tower or palace, built on the top of Olympus, the tallest mountain in Greece.