Hollows are natural depressions or cavities in the ground, often formed by erosion or the settling of soil. They can vary in size and depth, and are commonly found in landscapes such as forests, valleys, and hills. Hollows can serve as habitats for various plants and animals, providing shelter and resources. In some contexts, the term "hollow" may refer to a specific type of landform, such as a sinkhole or a dell. These features can influence local ecosystems and water drainage patterns, making them important for environmental studies and land management practices.