After being shot into the desert by the big cannon, Don't go to the for towers, go to the far away tall object. Clime the rock, and warp, the object is the peice of the brigde that was earlier warped away. After reterning this bridge, go back to the spot in the desert. Were the bridge was is a staircase into the ground. There are many levels at witch you fight diforant beasts. However they are easy and the rupees come pretty fast.