What is national parks civ 6?

National Parks in Civilization 6 are districts that are built in late-game and require certain conditions to be met in order to be built. A National Park district is built in a minimum of four squares, and each tile must be owned by the same civilization or city-state. The tiles within the National Park must be unimproved natural wonders, forests, or jungles, and each tile must have a minimum appeal of breathtaking. A National Park provides a variety of bonuses, including increasing the amenities and tourism to a city, and improving the culture output of the city it is built in. Additionally, they provide a certain number of additional Era Score points when constructed, which can help a player progress through the various eras. National Parks are a key part of Civilization 6's gameplay, and they are essential to maximizing the culture and tourism output of a civilization.