The hanging gardens of Le Havre , abbreviated the Hanging Gardens occupy a site of 17 hectares in the Sanvic district in Havre . This botanical garden is located on the heights of Le Havre inside the old fort of Sainte-Adresse . They dominate the lower town, the estuary and the English Channel . In total, the Hanging Gardens in 2010 had some 3,700 plant species. The spirit of the garden is to pay homage to botanists (such as the Norman botanists Lesueur , La Billardière , d’Incarville) who have traveled or still travel the world, and many of whom embarked in Le Havre .