Avesnes-le-Sec is a commune in the French Northern Department, in the Hauts-de-France region. It has an area of 10.4 km² and has 1,445 inhabitants (2020). It is part of the arrondissement of Valenciennes and the canton of Denain. Avesnes-le-Sec has a number of sites and heritage that testify to its history and culture. Some examples are:
Avesnes-le-Sec Communal Cemetery Extension, a war cemetery from the First World War, where 65 British soldiers are buried.
The ruins of the Moulin de Pierre, a tower mill from the 18th century, built with white limestone from the region. The mill was destroyed by a German shell in 1918.
The Saint Aubertus Church, a Gothic church from the 12th century, dedicated to the patron saint of the municipality. The church has a remarkable portal with sculptures and an organ from the 19th century.
Avesnes-le-Sec is also a pleasant place for walking or cycling, thanks to its green surroundings and its proximity to the River Somme. There are several routes and paths that run along the water or through the countryside. One of the most beautiful routes is the Voie verte du cavalier d'Agincourt, which connects Aniche to Escaudain over a distance of 12 km.