Where is the ledgenary treasure on level 18 (Molekin Mines)?

The legendary treasure is near the front of the mine. The problem is you can't get to it because a fan will blow you back. Go part way down the mine shaft and clear and blockage to the right so you can come back up on the right side using a side tunnel. Once you are there you will realize you can not get past the wind blown from the fan. Now go back down the mine shaft and find a blocked side tunnel on the LEFT side of the mineshaft. CLEAR it and work your way back to the end of that side shaft. BE CAREFUL HERE. Under those rocks is a "step on switch" that turns that darn fan OFF. Unfortunately, you only have 60 seconds to get from that shaft BACK the the other side shaft, and back to the fan WHILE it is turned off in order to retrieve the legendary treasure which looks like a glowing KNOT. If you get to it in time, the fan will not come back on. If you don't then give up and try the chapter over. Apparently that step on switch can only be used ONCE. If you are careful you can clear the tunnel. Recover the booty without stepping on the switch, THEN step on the switch and HURRY back to the front. If you have a flying skylander, and are pretty good at driving your flyer in tight places, you can fly from the switch back to the fan in a little less time. You can make it with a walking skylander but ONLY if you know the exact route you must take. You have NO time for errors. Might be best to "practice" the route a couple of times BEFORE you step on that switch.