Mountains are the highest landforms and consist of areas of land that are higher than hills. Some mountains contain mostly rocks. The highest mountains are Mount Apo in the Philippines and Mount Everest globally. Hills are smaller raised areas of land above the surrounding area but below mountains. The Chocolate Hills in Bohol province contain over 1,000 small hills. Volcanoes are mountains with openings called craters or vents. Some of the largest active volcanoes are Mayon Volcano in the Philippines and Taal Volcano. Plains are flat lands often used for growing crops like rice and corn, such as the Nueva Ecija Plains. Valleys are low areas between hills or mountains, often containing