Vaduz, Liechtenstein - May 28, 2016: The Vaduz Castle in Liechtenstein. Principality of Liechtenstein is one of the world's smallest countries. It is located between Switzerland and Austria. Shutterstock Image - Vaduz, Liechtenstein - May 28, 2016: The Vaduz Castle in Liechtenstein. Principality of Liechtenstein is one of the world's smallest countries. It is located between Switzerland and Austria. - ID: 784364272