Sacred Realm[]
"In a realm beyond sight the sky shines gold, not blue. There, the Triforce's might makes mortal dreams come true." — Book of Mudora verse
The Sacred Realm (聖地 Seichi?, Sacred Land), also referred to as the Golden Land, is a
recurring location in the The Legend of Zelda series. The Sacred Realm is described as a mythical plane, or parallel world, created along with Hyrule by the three Golden Goddesses. It is the resting place of the Triforce, an artifact of great power left by the Goddesses. Though the Sacred Realm is linked to Hyrule, the way to access it and acquire the Triforce within is shrouded in secrecy.
Ocarina of Time[]
The backstory of A Link to the Past has many similarities to the events of Ocarina of Time. The name "Seven Wise Men" from A Link to the Past is actually a mistranslation, with the original Japanese and later English re-releases giving them the same name as the Seven Sages from Ocarina of Time. Two of Ocarina of Time's developers, character designer Satoru Takizawa and script director Toru Osawa, even stated that the Imprisoning War and Seven Sages mentioned by A Link to the Past were the same events and characters seen in Ocarina of Time. Despite this, there are some details which conflict between the two accounts. Many fans consider these details to be retconed in the face of overall similarities and developer confirmation, while others maintain that the two games are describing separate events and characters.
Silent Realm[]
The Silent Realm from The Legend of Zelda: Skyward Sword is theorized to be the Sacred Realm. In Skyward Sword, Link obtains all three pieces of the Triforce in a place which appears to be the Silent Realm, given the area's identical appearance, method of entry, and Link's lack of items in the area. Because the stories of the creation of Hyrule state that the Triforce was left in the Sacred Realm, it would make sense that in Skyward Sword, which is generally accepted as the first game in the chronology of the series, the Triforce would be found in the Sacred Realm. The Silent Realm also changes to appear golden upon Link's acquisition of the full Triforce, similar to the Sacred Realm's description as the "Golden Land". However, the nature of the Silent Realm is distinctly different from that of the Sacred Realm. While both are equivalent worlds to Hyrule, the Silent Realm is a spirit world which only Link can enter, leaving Fi, his items, and his own physical body behind. The Sacred Realm, however, is a normal physical world, which any person can enter with their own body and equipment.
Split Timeline[]
It is speculated by some that alternate worlds such as the Twilight Realm and Termina may be unaffected by the timeline split. However, while these two realms are alternate dimensions, there is no evidence to support the idea that they exist outside of linear time. Both realms have demonstrated the ability to receive beings from the Child Timeline and return them to the Child Timeline when they exit back into Hyrule. There is no reason to believe that these two realms would only exist as a single timeline, or that they could "prioritize" inputs from one timeline, and later output these into both the timelines.
In addition, the renowned Youtube show, Game Theory, dismissed the Zelda Timeline, particularly the Defeat Timeline (in where Link fails on his quest) on the grounds that "the hero cannot be simultaneously victorious and defeated". Elaborating, he explained that with Link defeating Gannondorf, two perfectly possible timelines are created; However if Link dies at any point in his journey another separate timeline is created. Explaining that the only way for all 3 timelines to exist is the Many Worlds Theory (the theory that all possible pasts and futures exist in separate timelines). [1]