The subject has come up recently in the citizenship forum but it might be hard to find there.
You used to be able to enter Switzerland by virtue of having a green card even if your nationality was ineligible for visa-free entry. Switzerland joined Schengen area in 2008 and is no longer granting an exception for US green card holders. Here is the relevant link:
http://www.eda.admin.ch/eda/en/home/reps/nameri/vusa/ref_visinf/visusa.html
You used to be able to enter Switzerland by virtue of having a green card even if your nationality was ineligible for visa-free entry. Switzerland joined Schengen area in 2008 and is no longer granting an exception for US green card holders. Here is the relevant link:
http://www.eda.admin.ch/eda/en/home/reps/nameri/vusa/ref_visinf/visusa.html