City in the Sky - Piece of Heart Locations
As with all the previous dungeons in Twilight Princess, City in the Sky contains two heart pieces for you to collect. The first one is found towards the start of the dungeon, at the tippity top of the room with a large deku plant. The second heart piece is found in one of the later rooms of the dungeon, where you encounter lots of flying Clawshot targets.
First Piece of Heart - City in the Sky
The first piece of heart of the City in the Sky dungeon is found in the room with the large deku plant on the side of the dungeon with the destroyed bridge. Take a look at my screen shots if you're having difficulty finding this room.
After you defeat the larger deku plant you'll want to climb part way up the room until you come to a little alcove that you have to shimmy across. The place I am talking about is right behind me in the screen shot that has the chest with the piece of heart in view.
Still confused? Take a look at my other screen shots for a map location as well as a vantage point over looking the alcove and immediate area by the piece of heart.
Second Piece of Heart - City in the Sky
The second piece of heart in City of Sky is found in the room right next to the first piece of heart.
In the room that houses the second piece of heart there are a bunch of flying Clawshot targets for you to grab onto. You have to ride them over the walls and sometimes even through the walls. You can see the chest which the second piece of heart is in while in this room but in order to reach it you need to venture into the room adjacent to this one that leads outside.
Take a look at my screenshot above if you're confused on what I am talking about. What you need to do is follow the U shape of targets around the room and you'll enter the door that leads to this chest, where you see me standing in the screen shots below.