The Gerudo Tower is a location in The Legend of Zelda: Breath of the Wild. It is a Sheikah Tower located in the Gerudo Highlands region of Hyrule, just to the west of Birida Lookout. The Gerudo Tower is by far the tallest of all Sheikah Towers, and as such, scaling it requires a tremendous amount of stamina. However, it is possible to use the paraglider to fly to a higher point on the tower from a lookout on the surrounding cliffs, allowing Link to scale the tower with lower amounts of stamina. The "Climbing" Armor set can make climbing the tower easier as can "Hasty" food or elixirs which increase Link's movement speed which includes climbing speed. Both Energizing and Enduring food or elixirs can be consumed while climbing to restore and/or give Link extra stamina. Kass can be found playing his accordion at the tower's top, and gives the Shrine quest "Sign of the Shadow".
The Tower's Shadow[]
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The tower plays a central role in this shrine quest as its shadow must be over the ancient dais platform which occurs from 3:00 PM to 4:00 PM when the sun is shining or from 1:00 AM to 2:00 AM when the moon is shining. The dais will glow during these peroids and Link must fire a arrow at the light source (sun or moon depending on the time frame) to reveal the nearby Sasa Kai Shrine.
Spoiler warning: Spoilers end here.