Hyde Park (London) is 0.70 times as big as Monaco
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Monaco, officially the Principality of Monaco, is a sovereign city-state and microstate on the French Riviera in Western Europe. It is bordered by France to the north, east, west and by the Mediterranean Sea to the south. With an area of 2.1 km2 (0.81 sq mi), it is the second smallest sovereign state in the world, after Vatican City. Its 19,009 inhabitants per square kilometre (49,230/sq mi) make it the most densely-populated sovereign state in the world.