I think that Liechtenstein counts as Switzerland to all intents and purposes, that the Swiss do not see going to Liechtenstein as going "abroad". The sad thing about Liechtenstein is that it is pretty bland and there is not that much of interest there. You could collect a passport stamp, though, in the tourist office. Don't know if those of us with EU passports have the right to do that though. Maybe us Brits after Brexit!