I want that rope.

Hint 1 of 7:

You'll first have to get it off the wall.

Hint 2 of 7:

And you'll need something to attach it to afterwards.

Hint 3 of 7:

Take a closer look at the turret.

Hint 4 of 7:

Noticed any cannonballs?

Hint 5 of 7:

Use one of them on the steel basket.

Hint 6 of 7:

Pull the rope.

Hint 7 of 7:

Great -- you demolished the whole thing.