The Ash Swamp is a location from The Legend of Zelda: Breath of the Wild. It is located in the southeast part of the West Necluda region. Decayed Guardians and many deactivated Guardians as well as a few Bokoblin encampments can be found throughout this swamp.
A century ago, Link and Zelda stumbled upon the Ash Swamp while fleeing from the Guardians during the Great Calamity. Upon their arrival, they encountered a horde of Guardian Stalkers. Link stood up to one of them, which caused Zelda to unlock her powers and deactivated most of them. Out of exhaustion, Link collapsed, two Sheikah guards approached them, and Zelda ordered them to take Link to the Shrine of Resurrection.