A megastructure is a large-scale construction project that often involves advanced engineering and technology. These structures can serve various purposes, such as energy generation, habitation, or transportation. Examples include space habitats, solar power satellites, and Dyson spheres, which are theoretical constructs designed to harness energy from stars. Megastructures are typically designed to accommodate large populations or significant amounts of resources. They can be found in both science fiction and real-world applications, pushing the boundaries of what is possible in architecture and engineering. The concept often inspires discussions about future urban development and sustainability.