Classical rain garden illustration

Quick answer：

A classical rain garden illustration typically shows a picturesque scene of a rain garden designed in a traditional or elegant style. Rain gardens are designed to capture rainwater runoff from roofs and paved surfaces, allowing it to slowly infiltrate into the ground, reducing stormwater runoff and pollution. They often feature native plants, which are adapted to the local climate and soil conditions, and are designed to provide aesthetic appeal while also serving ecological functions.