Liechtenstein is so small that you can traverse around it multiple times in a day (via car) and we did. Within 15 minute you can cross the Swiss, Liechtenstein, and Austrian borders if you so desire. We went into Austria by accident but turned around since driving there required a different road pass. In Vaduz, the main city of Liechtenstein the activity is to hike the hill to the castle.
View of the Swiss side from Vaduz
Made it to the top! The castle is a private residence, can't go in.
Vaduz has a summer sculpture exhibit
In front of the bank
Hello from Liechtenstein!