Luxembourg is a small, landlocked country located in Western Europe. It has a population of around 525,000 people and is the world's only remaining grand duchy. The country has a highly developed economy with the world's highest GDP per capita. French, German and Luxembourgish are the official languages, though French is predominant. Popular tourist destinations include Luxembourg City, with its historic fortifications and grand ducal palace, the picturesque Moselle Valley wine region, and medieval castles such as Vianden Castle.