The document discusses hardscaping, which refers to permanent landscape elements like paths, patios, and seating areas. It outlines the advantages of hardscaping, such as providing order and visual interest in a garden, and being practical by allowing comfortable movement and preventing muddy feet. A variety of materials can be used for hardscaping, including wood, brick, pavers, stone, and gravel. Gravel in particular is a versatile and budget-friendly option, though it requires more maintenance like snow removal and weed control. An example of the Garden of Five Senses in New Delhi is given, which aims to stimulate the five senses through beauty and attractions, while using hardscaping elements.