The Netherlands is the main constituent country of the Kingdom of the Netherlands. It is a small, densely populated country, lying mainly in Western Europe, but also including three islands in the Caribbean. The European part of the Netherlands borders Germany to the east, Belgium to the south, and the North Sea to the northwest. The Netherlands' name literally means "Low Country", inspired by its low and flat geography. Only about 50% of its land exceeds one metre above sea level. Most of the areas below sea level are man-made and are called 'polders'. The population density of the Netherlands is about 500, making it the fifth-most populated country in the world. Nevertheless, the countries' food and agriculture export is the second-largest in the world, after the United States.