Given this paragraph, what is Peru's most popular tourist attraction and how many people visit it every year?

Machu Picchu is both a cultural and natural UNESCO World Heritage Site. Since its rediscovery in 1911, growing numbers of tourists have visited the site each year, with numbers exceeding 1.4 million in 2017.[57] As Peru's most visited tourist attraction, and a major revenue generator, it is continually exposed to economic and commercial forces. In the late 1990s, the Peruvian government granted concessions to allow the construction of a cable car and a luxury hotel, including a tourist complex with boutiques and restaurants and a bridge to the site.[58] Many people protested the plans, including Peruvians and foreign scientists, saying that more visitors would pose a physical burden on the ruins.[59] In 2018, plans were restarted to again construct a cable car to encourage Peruvians to visit Machu Picchu and boost domestic tourism.[60] A no-fly zone exists above the area.[61] UNESCO is considering putting Machu Picchu on its List of World Heritage in Danger.[58]

Machu Picchu is Peru's most visited tourist attraction, and a considerable number of people visit it every year. My data shows 1.4 million people visited Machu Picchu in the year 2017.