Greenwich is a district located in southeast London, England, known for its rich maritime history and cultural significance. It is home to the famous Greenwich Mean Time (GMT), which serves as the basis for timekeeping worldwide. The area features several notable attractions, including the Royal Observatory, the National Maritime Museum, and the historic Greenwich Hospital. The River Thames flows through Greenwich, providing picturesque views and opportunities for river transport. The district is also recognized for its beautiful parks, such as Greenwich Park, which offers stunning vistas of the London skyline. Greenwich is a UNESCO World Heritage Site, celebrated for its historical architecture and significance.