Veil Falls

Veil Falls serves as the gateway to the Cloud Tops, where the Wind Tribe moved their Palace of Winds up high above Hyrule. The falls serve as the "source of the flow" in Hyrule, or in others words they are the source of Hyrule's water supply and run all the way into Lake Hylia. A sealed door that leads up through the caverns behind the falls can only be opened when the missing Kinstone Piece kept by Hyrule's King Gustaf in Royal Valley is fused with the piece left within the door itself. When this piece is fitted into the door, it yields passage to the source of water for Veil Falls, "Veil Springs." At the very top of Veil Springs is a whirlwind that will send a bystander up to the Cloud Tops and set them on the path to the Wind Tribe's settlement. The Wind Tribe, being Gustaf's chosen favorite of Hyrule's other tribes, gifted him with the Kinstone Piece necessary to find their settlement and subsequently the Wind Element they guarded in their Palace of Winds. In The Legend of Zelda: The Minish Cap, Link traveled to the Royal Valley in search of a way to find the Wind Element and received the golden Kinstone Piece from Gustaf's spirit, who told him to seek out the "source of the flow" to find the Wind Element, meaning Link would have to find Veil Falls. Link finally realized, with Ezlo's assistance, that the "source of the flow" in Hyrule was Veil Falls and discovered the secret route to the Cloud Tops atop Veil Springs. Link used the passage of Veil Falls to seek out the Wind Tribe and claim the Wind Element from the Palace of Winds.