1. Kamilo Beach, Hawaii, United States
Kamilo Beach in Hawaii may look like paradise, but it’s one of the most polluted shorelines on Earth; buried in plastic debris from across the Pacific. Nicknamed “Plastic Beach,” it collects an estimated 15–20 tons of trash each year, with 90% of it made of plastic. Once a natural gem, it’s now a stark symbol of global marine pollution and our modern throwaway culture.