You must turn on light tower at night use fire arrow or light arrow. Be sure to have the windmill moving first. You can activate it by setting the wind direction to north and stepping on the switch at the back of the windmill.
First go to skullduggery island,take your ship to a island called Keys World island and you will find the key of the chest on counterfeit island!;)
The key to the investigator's chest on Counterfeit Island is hidden in the bushes to the right of the cottage. You need to use a stick to reach it and then unlock the investigator's chest to get the next clue.
Go inside the pirate ship on windfall island during the nayru's pearl quest then finish the puzzle and open the chest and now you have bombs.
undo the skull picture, the it will open (it's not very difficult, but then you'll figure it out.)
The Cavalier chest is a type of hope chest that was first made in the 1940s. The best way to unlock a Cavalier chest without the key or combination is by contacting a locksmith.
There is no treasure chest on Astro Knights Island.
It's simple! Just look for a treasure chest and unlock the chest with the key!
You don't unlock it. There's nothing in it, and you can't unlock it, anyway. If somebody does unlock it, please edit this answer. I'm curious to learn if you can unlock it.
Follow the beginners wuests then you unlock it
You right click it!
A Vault Hunter carrying a Golden Key can unlock the chest on the fast travel room on sanctuary on Borderlands 2
the snowman is in explore's camp in dizzywood. it is near the chest where it said"you need a key to unlock this chest".