Derelict structures are buildings or facilities that have fallen into disrepair and are no longer in use. These structures often show signs of neglect, such as broken windows, crumbling walls, and overgrown vegetation. They can be found in urban and rural areas, and may include abandoned houses, factories, or warehouses. The presence of derelict structures can pose safety hazards and attract vandalism or illegal activities. Communities may seek to rehabilitate these sites through redevelopment projects or preservation efforts, aiming to revitalize the area and improve public safety. Examples of such efforts can be seen in cities like Detroit and New Orleans.