Les Constellations de Metz is a free event that takes place every summer in Metz, France. This event features a magical light show that illuminates the city's landmarks and monuments. Visitors can enjoy the light show while walking through the city, and there are also a variety of other entertainment options, such as live music and street performers. This event is a great choice for budget-conscious travellers who want to experience a unique and magical event without spending a lot of money.