This public garden could take the place of arboretum in the city since it contains: ginkgo biloba, plane tree, chestnut, maple, sweetgum, cedar of Lebanon ... and bamboos that make this place adorned with a body of water , a haven of greenery in the heart of the city.
Planchon Square, designed in 1858 by the Bülhler brothers, perfectly illustrates the art of 19th century landscape.
The mossy island that adorns the pond was at its creation a small rock of about fifty centimeters, which over time was enriched with limestone and moss, to give this huge green cauliflower, lighthouse of the garden.
Birds have always been part of the landscape. Alternately swans and ducks followed one another on the water. But during the Second World War, the basin was drained of water. It turned into a shelter surrounded by sandbags and the birds had to go to the pan to face the restrictions.
