Physical sites refer to specific locations that have significance due to their historical, cultural, or environmental value. These sites can include landmarks, monuments, parks, and natural formations. They often attract visitors and researchers interested in learning about the area's heritage or ecology. Examples of physical sites include the Great Wall of China, Machu Picchu, and national parks. These locations can serve educational purposes, promote tourism, and contribute to local economies. Preservation efforts are often necessary to maintain their integrity and ensure they can be enjoyed by future generations.