Stone Tower

The Stone Tower is a mysterious tower located at the northern edge of Termina's Ikana Canyon. It is filled with a large chasm, blocks, and pressure switches. Boulders constantly fall here, making the climb to the top a hazardous one. Guarding the chasm are Fire Keese and several Beamos.

Only with the Elegy of Emptiness was Link able to scale the chasm and reach the top, coming to face the Stone Tower Temple. At the base of the temple, a curious red gem can be found, that when struck with the Light Arrow, possesses the power to completely flip everything inside the chasm upside down. Curiously, this does not affect the rest of Termina in any way. It is a common misunderstanding that there are ReDeads guarding the Stone Tower's massive stairway. While these undead horrors are present in the Ikana region as well as their close cousins the Gibdos, the ReDeads only reside in the Ancient Castle of Ikana and are therefore not present in the region of the Stone Tower nor it's interior temple. However, the audio file of their disturbing moans does in fact play when one draws near to the gaping maw which leads into the temple itself. This is purely to give a creepy aura, nothing more.

Origins
The origins of these towers are mysterious, but there's a hypothesis that may help to clear things up.

Trivia

 * Closer observation to the dungeon map reveals that when the red gem is hit, Stone Tower Temple not only flips upside down, it does, in fact, mirror itself as well. This may just be a mistake in the game, or something else...