Jardins suspendus, Botanical garden in Le Havre, France.

The Jardins suspendus is a botanical garden perched on a hillside in Le Havre, using old fortification walls as its framework. The site is divided into several garden areas separated by tall stone walls, each housing different plant collections.

The Fort de Sainte-Adresse was built between 1854 and 1858 under the Second Empire, following the military model inherited from Vauban. It housed foot artillery battalions, then in the 20th century the Home Run camp, the gendarmerie and the Republican Guard; the 74th Infantry Regiment took it over in 1963 and the base was decommissioned in 1979. The city bought the abandoned fort in 2000, chose a botanical garden in 2005, and the Jardins suspendus opened on 20 September 2008 after three years of works.

The gardens bring together plants from different continents, creating a place where visitors walk through many climates in one location. Inside the greenhouses, tropical species grow side by side in an arrangement that would never occur naturally.

The gardens sit on a hillside, so wear sturdy shoes and allow extra time to explore the different areas. The paths are well paved, but there are some steep sections, especially when climbing from the town below.

The garden's plant collections honour Norman botanists such as Lesueur, La Billardière and d'Incarville, many of whom sailed from Le Havre. On the south-east bastion, the Australian garden grows a Wollemi pine, a species only discovered in Australia in the 1990s.