Vaduz is the capital of Liechtenstein, one of the world's smallest and wealthiest countries. It is one of only two 'doubly landlocked' countries in the world, meaning it is surrounded by countries (Switzerland and Austria) that are themselves landlocked. The city is overlooked by Vaduz Castle, the official residence of the Prince of Liechtenstein. Because the country is so small—only about 160 square kilometers—it has no airport and no national currency of its own, using the Swiss Franc instead. Liechtenstein is a major global hub for dental products, particularly false teeth, and has more registered companies than citizens. Despite its tiny size, Vaduz is a center for contemporary art and finance. The country's unique geography allows for a 'commuter' economy where nearly half the workforce travels in daily from neighboring Austria and Switzerland, crossing international borders in minutes.