Payments in euro are accepted almost everywhere but you are likely going to get the worst exchange rate possible. That’s why it’s worth having some Swiss francs.
In Vaduz you can visit for free the Post Museum of Liechtenstein (Postmuseum Liechtenstein) and Ski and Winter Sports Museum (Ski- und Wintersportmuseum).
The fastest way to get to Liechtenstein is by flight to Zurich airport and then by train or by bus. But the cheapest one is, however, to use budget-friendly Air Belin airlines and make a connection flight in Berlin.
If you are planning to get from Zurich to Liechtenstein you can buy the entire ticket Zurich – Vaduz. It will include two journeys: the first one is by train going to the boundary town Sargans and the second one is by bus from Sargans to Vaduz. Buying a single ticket for each of these journeys will cost more.
August, 15 the gates of the Prince castle are open for everyone and in the castle’s park the table is set with wine and refreshments from royal kitchen.
Purchasing the Tageskarte is convenient and advantageous. It costs 5 francs and is valid for all buses running across Liechtenstein during a day. Thus you will be able to see several cities by making a stop at each of them.
In Liechtenstein prices for car rentals, as well as for many other things, are very high. Therefore, it would be better to rent a car in the neighboring countries.