To explore the cave in A Life’s Dedication in Boetia in Assassin’s Creed Odyssey slide through the hole in the wall behind the steam.
All Boetia Guides
All Assassin’s Creed Odyssey Guides
Follow the cave keeping right until you get to a door. Interact with the door and keep following the corridor. Walk left past the blocked door and keep following the corridor.
Drop down and loot the chest, interact with the pillar and the wall.