Someone has compiled a nice PDF document showing photos and short explanations for nearly all the the known surviving Panther family tanks that are in various museums and collections around the world. Here is a link with a list of the surviving Tiger family tanks around the world. Here is a PDF document with surviving Panzer IV variants. And here is a PDF document with surviving Panzer IVs. Here is the home page.
Below is a list of some of the better known tank museums around the world:
Saumur Tank Museum