The Belfort Citadel is a historic fortress located in the city of Belfort, France. Built between 1668 and 1870, it was designed by the military engineer Vauban to protect the region from invasions. The citadel is perched on a hill, offering strategic views of the surrounding area and has been recognized as a UNESCO World Heritage site. The citadel features impressive walls, bastions, and a series of buildings that served various military functions. Today, it is a popular tourist attraction, showcasing its rich history and providing visitors with panoramic views of the city and the nearby Vosges Mountains.