It is just across the drawbridge from the Hub. When you cross the bridge, use the controls that raise and lower the ball. Raising it all the way up, then bringing it down hard, is how you crack open the underground path to the production zone (botanical research lab).
You use the three levers with the circle controls on it and pull the circles all the way down.
by spinning the circle around and getting the ball in the middle whole each time
its in the museum on mainstreet of steamworks island :)
It's Steamworks Island #14th Island
(The solution is at the related question "How do you beat Steamworks Island")
the crab on steamworks island is next to the living quarters
You go to Steamworks and head to the museum and there is the Deogen
use one of your items that ill push it down
steamworks island
You reach the Prodcution zone (a botanical research lab) by crossing the bridge from the Hub. The bridge key is the quarters of Captain Ziggs, on top of the Hub. Once you cross the bridge, climb the crane that has a wrecking ball attached. Push all three switches to the "down" position and the ball will crash through the weak spot on the ground below.
There is a video walkthrough at the related link below. There are written WikiAnswers solutions at the related questions, as there are for all Poptropica islands. (How do you beat Steamworks Island) (What is the walkthrough for Steamworks Island)
Well, there is a song called "Wrecking Ball" by Miley Cyrus, but that song says "I came in like a wrecking ball", not you.