Crannies are small, narrow openings or crevices found in various surfaces, such as walls, rocks, or even trees. They can serve as hiding spots for small animals or insects, providing shelter and protection from predators. Crannies can also collect dirt, debris, and moisture, which may contribute to the growth of plants or fungi. In architecture, crannies can be seen in the design of buildings, where they may appear as gaps or spaces between bricks or stones. These features can add character to a structure, but they may also require maintenance to prevent issues like water damage or pest infestations.