The correct answer is - Europe.
Even though Europe is the second smallest continent on the planet, it is a continent where around a third of the tourists in the world are going and enjoying their vacations. This is due to multiple factors. Europe is considered as the birthplace of the modern civilizations, and its history is the most propagated around the world. The majority of the people from North America, South America, and Australia have European ancestry. There's tons of historical beautiful sites, and the architecture and art are one of the best, if not the best in the world. The nature also provided very attractive spots which are adored by the tourists.