Boulders are large, naturally occurring rocks that are typically bigger than a pebble but smaller than a cliff. They can be found in various environments, including mountains, riverbeds, and deserts. Boulders are often formed through processes like erosion, weathering, and volcanic activity, which break down larger rock formations into smaller pieces. These massive stones can vary in size, shape, and composition, depending on their geological origin. Boulders are significant in nature as they can influence local ecosystems, provide habitats for wildlife, and serve as natural barriers in landscapes. They are also popular in landscaping and outdoor activities like bouldering, a form of rock climbing.