A) Run around to the right side of the docks and there is a chest behind the rock.
B) Right before you go through the arch on the right, there is a bush in a corner of the stone wall off to the left. The chest is hidden right in the bush.
C) Go into the Temple of Ares and the chest is against the back wall. (It can spawn on either side)
D) Go into Banquet Hall and go into the room on the left. The chest is against the left wall.
E) There is a building to the right of the entrance to Achaea. The chest is behind the building.
A) There are ruins near the Cave of Ruin. There is a chest behind them.
B) Go inside the Cave of Ruin and into the back room. There is a chest in there behind the stalagmite.
C) Go across the bridge and follow the path up to the Cthonic Temple. The chest is around the left side next to a boulder.
D) Go into the Cave of Thunder and the chest is in the third room.
F) Go into the Cavern of the Gorgon and after you complete both battles, go up on the platform in the last area. The chest is off to the right.
G) Around the corner from Pitch Bright Cave
H) Enter Pitch Bright Cave and run through to the room in the back. There is a chest in a nook next to the platform.
I) Enter the Echoing Cave and go into the room off to the right. There is a chest in there.
J) Go behind the two blue tents next to Ajax.
K) Go into Eaglamemnon's tent and into the second room and the chest is in there.
L) Enter the Palace of Hyssarik and the chest is in the back left corner.
M) Fight your way to the last room of the Ophidian Palace and there is a chest in the last room against the wall on the right.
A) Go into the second area and all the way to the right, into the grassy area. There is a treasure chest behind the ruins.
F) Each instance of the Labyrinth has one treasure chest that spawns in a different location each time. I have included a map below showing each location, since explaining where they all are would be complicated. I have also included only one image of a Labyrinth chest, since they all look the same.
A) Go up the ramp and the chest is next to the tree where Pindar is.
B) Go into the building where the pool and Crassius Beakimus is and the chest is to the right of the door
C) Run past the building with the pool/spa that Crassius Beakimus is in and go behind the building. You will see the chest there.
G) Go to the area where Easchylus and Fabron are and go down the ramp and behind the platform. The chest is hiding behind a bush.