Lisbon is one of the world’s greatest natural harbor. It is one of the oldest cities in the world and the oldest city in Western Europe. You can find two sites listed as a World Heritage Site by UNESCO: Belem Tower and Jeronimos Monastery. This city is the wealthiest region in Portugal. A wonderful city designed with the oceans, close to sandy beaches, and one of the world’s largest aquariums, that is Lisbon.