Paris for 31 percent of the GDP of France. According to the Economist Intelligence Unit Worldwide Cost of Living Survey in 2018, Paris was the second-most expensive city in the world, behind Singapore and ahead of Zurich, Hong Kong, Oslo and Geneva. The city is a major rail, highway, and air-transport hub served by two international airports: Paris-Charles de Gaulle (the second busiest airport in Europe after London Heathrow Airport with 69.5 million passengers in 2017) and Paris-Orly. Opened in 1900, the city's subway system, the Paris Métro, serves 5.23 million passengers daily, and is the second busiest metro system in
Williston Municipal Airport Williston Municipal Airport Williston Municipal Airport is a city-owned, public-use airport located two nautical miles (4 km) southwest of the central business district of Williston, a city in Levy County, Florida, United States. Commonly referred to as Williston Airport, it is located southwest of Gainesville Regional Airport (GNV). Opened in 1974 for public use, it does not have a control tower. This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility. Within of the airport are the internationally known dive springs of "Devil's Den" and "Blue Grotto". Formerly