A "secret garden" refers to a hidden or secluded area filled with plants, flowers, and trees, often providing a peaceful retreat from the outside world. These gardens can be found in various settings, such as private homes, parks, or even urban environments. They are typically characterized by their lush greenery and the sense of tranquility they offer. The concept of a secret garden is popularized by the novel The Secret Garden by Frances Hodgson Burnett, published in 1911. In the story, a young girl discovers a neglected garden that becomes a place of healing and friendship. This idea resonates with many, symbolizing personal growth and the beauty of nature.