Basel-Mulhouse-Freiburg is a unique tri-national metropolitan area located at the borders of Switzerland, France, and Germany. It encompasses the cities of Basel in Switzerland, Mulhouse in France, and Freiburg in Germany. This region is known for its rich cultural diversity, historical significance, and economic collaboration among the three countries. The area is served by the EuroAirport Basel-Mulhouse-Freiburg, which is the only airport in the world jointly operated by three nations. This airport facilitates international travel and trade, making the region a hub for business and tourism. The cities are connected by efficient public transport, enhancing accessibility and cooperation.