Forêt de Montgeon is Le Havre's big green escape, spread across the upper part of the city with woodland paths, ponds, and sports areas. It is useful because Le Havre can feel hard-edged at street level; the forest gives the port city room to breathe.
It is best for a relaxed walk, a picnic, or a break with children rather than a must-see monument. Pair it with the Jardins Suspendus if you want to see Le Havre from its higher, greener side.