Well, the chests that appear in dungeons always contain goodies unlike the regular treasure chests you find normally.

Take this scenario. The path to the dungeon boss is left fork, then right fork, then left fork, then left fork, then right fork. Then you be 100% sure that there will be a treasure chest in the first right fork, the next left fork, the next right fork etc. (if not a treasure chest, then most likely a switch that opens up the opposite fork allowing the player to proceed.)

My theory? The bosses have strategically planted these chests so the player is inconvenienced and has to walk further to get all the chests. Oh, the evility of it all!