At the clock, go all the way to the right. There is a broken board. Jump on that and you should fall through. Push the crate over to the ladder and jump on the ladder to go across.
you climb up and find the secret entrance
get into your flyer and go to buenos aires
in diamond plains
the gears in the clock tower
it is on the top of the zapping windows tower
just play the game and you will find out.;)
next to the guy on the red bar then click on the sparkly spot on the wall
You have to complete most of the main story line first, which will lead you to many items. One of the items will get you into the window, I think it's the potions. You go inside and get to the top where the gears are and it fixes the tower.
A:you drop from the giants gardenA:use the jetpack from the airship graveyard to fly to the tower
you turn it over and over again until the hatch on the top opens up.
What you have to do is jump off the top of the tower with the pilgrim and signal flag.
you have to go to the giant layer on top of one of the buildings then at the end you fall through the clouds on top of the water tower