Let's clean up the city and the Háj is a city-organized event, a voluntary work. It is organized regularly every year in the spring. The event is aimed at spring cleaning of the Háj - Nicovô locality and organizing voluntary work in the boroughs of Liptovský Mikuláš. The aim of the voluntary work is to create a clean and thus pleasant place to rest in the Háj - Nicovô locality.
The Háj - Nicovô locality is a natural and cultural recreation area of the city of Liptovský Mikuláš. There is a children's playground, and running trails named after Olympic athletes from Liptovský Mikuláš. The site provides views of all the surrounding mountains. From the north to the Western Tatras, from the west to the Great Fatra, from the south to the Low Tatras as well as the city of Liptovský Mikuláš with Liptovská Mara reservoir.