Casinos, egg tarts and the Ruins of St. Paul's church ... what do you think of when you hear about Macao? There might be some other facts about the city to surprise you. Macao bears witness to one of the earliest and longest-lasting encounters between China and the West, as the influence of Portuguese culture can still be seen across the city. But it's not only Macao's culture and history that are impressive. The city's gross domestic product (GDP) per capita ranks second in the world, making it one of the wealthiest places to live. It's also the most densely-populated city in the world. Macao also takes the crown for offering its residents the longest life expectancy of all Chinese cities; people there can hope to live to over 84 years old.