Introduction to Monaco: Monaco (Monaco-Ville) is located on the southern coastline of the Mediterranean Sea. It is surrounded by France on three sides in the north, west and east. The border is 4.5 kilometers long and the coastline is 5.16 kilometers long. Monaco has a developed economy, mainly based on gambling, tourism and banking. Because of its system of not having to pay personal income tax, it has attracted a large number of wealthy tax avoidance immigrants from other European countries, making it one of the most densely populated countries in the world.