by For the Well, Well, Well side quest in Hogwarts Legacy, travel to Aranshire then head southeast on your broom to find a well in the hills.
Approach the Magical Well and speak with it to receive a map.
Travel to the Irondale Floo Flame in the Feldcroft Region then head southwest of town using your broom toward a treasure vault. The tree on the treasure map can be found there.
Use Levioso on it to pull the tree out of the ground revealing a chest. Loot it to receive the Treasure-Seeker’s Bicorne Hat appearance completing the quest.