Ancient Castle of Ikana

In Majora's Mask, the Ancient Castle of Ikana is located deep in Ikana Canyon, and is home to the long dead king of the Ikana kingdom, Igos du Ikana. The Castle is the center of the once-great kingdom of Ikana. When the Garo Ninjas moved in nearby, however, the Garos infiltrated the fort and brought the kingdom to its knees.

The castle is an ancient building that is home to countless undead enemies, especially ReDeads and Wallmasters. You don't get an upgrade for clearing the Castle, but you learn the Elegy of Emptiness song. Once you reach the end of the castle, you will encounter Igos du Ikana and his two minions. After using the Mirror Shield (which you got on the Bottom of the Well) to deflect sunlight to King Igos and his dark minions, and beat them, The King teaches Link the Elegy of Emptiness to help him further advance to the top of the Stone Tower.

The main entrance of this castle was sealed for a long time and will never open up again. Therefore Link had to find an entrance somewhere else. The two accessible entrances are:
 * 1) Travel through the Beneath the Well maze to get the Mirror Shield, and he could enter the castle via a small well that is connected to the courtyard of the castle.
 * 2) The other entrance can only be used once you have the Mirror Shield or Light Arrows. It is a small opening next to the main gate and can be opened by removing the Sun block, by either reflecting sunlight on it or shooting it with a Light Arrow.

Once inside, Link had to get to the balcony outside and place a Powder Keg on the crumbled section to shine light into the castle (during daytime of course). Using this ray of light, he could remove the last Sun Block in order to get to King Igos' Throne Room, where the king and his nameless servants were waiting for him. After defeating them, King Igos taught Link the Elegy of Emptiness.

The ReDeads inside the ruins react to the Gibdo Mask, Garo's Mask, Kamaro's Mask or the Captain's Hat. They start dancing as soon as Link dons one of these masks. This is so because there is a idea that they were once members of the Castle's dancing troupe before they died.