Luxembourg is a landlocked country in western Europe, bordered by Belgium, France, and Germany. It has two principal regions: the Oesling in the North as part of the Ardennes massif, and the Gutland (\"good country\") in the south.
Luxembourg is a parliamentary, democracy headed by a constitutional monarch. Under the constitution of 1868, executive power is exercised by the Grand Duke and the cabinet, which consists of several other ministers.
Luxembourg has a number of minor rivers, such as the Eisch, the Alzette, and the Pétrusse, but the main river is the Moselle with its tributaries-the Sûre and the Our. Together, their courses serve as a natural boundary between Luxembourg and Germany. Along their banks, many of the country's medieval castles can be found.