Eyne is a commune in the Pyrénées-Orientales department in southern France.

The Jardin ethnobotanique d'Eyne, also called the Jardin de la Vallée, is a botanical garden specializing in ethnobotany. It is located at the Maison de la Vallée, avinguda de Cerdanya, and is open daily in the warmer months; an admission fee is charged.

Ethnobotany is the study of a region's plants and their practical uses through the traditional knowledge of a local culture and people. An ethnobotanist thus strives to document the local customs involving the practical uses of local flora for many aspects of life, such as plants as medicines, foods, intoxicants and clothing. Richard Evans Schultes, often referred to as the "father of ethnobotany", explained the discipline in this way: "Ethnobotany simply means ... investigating plants used by societies in various parts of the world."

Today's garden was created on the site of the farm's earlier vegetable garden. It now contains a representative collection of plants local to the Pyrenees, including trees, flowers, and useful plants, arranged in groupings according to the typical altitude at which the plants grow.