Monaco City is the capital of the Principality of Monaco. The whole city is built on a cliff in the Alps that stretches into the Mediterranean Sea, so it is called " the capital on the top of the cliff. Coming here, I will really sigh - "rich countries and beautiful cities. European-style buildings built according to the mountain situation have their own characteristics and are more beautiful against the backdrop of the Mediterranean Sea. When I arrived in Monaco, I couldn't help breaking my mind over and over again that there was a blue called Mediterranean Blue. It seems that the sea here is very blue.