Go to the arch with the hanging light bulb. Climb the cord above the bulb all the way to the top. Jump hard right to reach the torn picture piece.
If this doesn't work, try going out and bringing in a balloon to help you jump.
Above the coffins near the middle of the Underground Tour is a high arched dome, with a light bulb hanging from a long cord. Climb the cord to find the picture piece.
On the Underground Tour, there is a high arch with a light bulb hanging down. Climb the wire, and jump to the right to get the picture piece there.
Climb the wire from the light bulb in the arch, then jump hard to the right from the top.
You just have to get the balloon and jump to the paper with it. If you try to get it at night then you have to be a good jumper.
On the underground tour, there is a high dome with a light bulb hanging down, Climb the wire to the top, then jump to the right to get the picture piece.
In the Underground, go to the hanging light bulb and climb up the cord. Jump hard to the right to get the dragon picture piece.
On the Underground Tour, there is a high arch with a light bulb hanging down. Climb the wire, and jump to the right to get the picture piece there.
You don't need a balloon to get the dragon picture piece from the underground - it is only an easy way if you haven't already gone into the museum. Climb ALL THE WAY UP on the cord in the underground arch. Jump VERY HARD to the right and you should get the picture piece.
If you go to the Underground Tour, there is a light bulb above a bunch of Poptropican skeletons. Climb up the cord and the paper is on the right. Jump off toward the paper.
Halfway through the Underground Tunnel is a high arched dome in the ceiling. Climb up the light bulb cord to the very top, and jump right to grab the piece.
The same way you got in to get the picture piece : use your key.
Go to the large dome in the roof, where the light bulb is hanging down. Climb the cord all the way to the top and then jump directly to the right.