Unusual and distant international destinations were what initially piqued my interest in postal history. Below is a fantastic registered cover to one of Europe’s smallest countries landlocked between Austria and Switzerland, Liechtenstein declared its sovereignty in 1806. This envelope was sent in 1903 from Kilbourn, Wisconsin to Vaduz, Switzerland. Why the sender wrote Switzerland rather than Liechtenstein is unknown to me. Vaduz is the capital of Liechtenstein and has a population of only 5450 in 2017.
1903 registered letter to Vaduz, Liechtenstein. Five cents letter rate + eight cents registry fee.