A cobblestone plan in garden landscape refers to a layout or design of a garden or park featuring cobblestones. Cobblestones are small, rounded stones commonly used in pathways, walkways, and garden borders. This type of plan typically includes details on the arrangement and placement of cobblestones, as well as other elements such as plants, water features, and seating areas. It is an important component of landscape architecture, providing a functional and aesthetic touch to outdoor spaces.