What is Greenwich famous for?

Greenwich is most famous for being the home of the Prime Meridian (0° longitude), which runs through the Royal Observatory. This line marks the starting point for measuring longitude around the world. It was chosen as the prime meridian because it passes through the Old Royal Observatory, which was founded in 1675 and was the center of astronomical research for many years.

The Prime Meridian is a major tourist attraction in Greenwich, and visitors can stand with one foot in the Eastern Hemisphere and one foot in the Western Hemisphere. The Royal Observatory also houses a number of other historical artifacts, including the world's oldest telescope, the Harrison Timekeeper, and the Greenwich Mean Time clock.

In addition to the Prime Meridian, Greenwich is also known for its maritime history. It was once a major port, and the Cutty Sark, one of the last remaining tea clippers, is now preserved as a museum ship in Greenwich. The National Maritime Museum, located in Greenwich, tells the story of Britain's maritime history from the early days of exploration to the present day.

Other notable landmarks in Greenwich include the Queen's House, a 17th-century palace designed by Inigo Jones, and the Royal Naval College, which was founded in 1873 and is now a UNESCO World Heritage Site.