Grecian Rocks is a shallow area that is one of the best Florida Keys snorkeling spots off Key Largo. The inside of the reef is also very protected from the wind and the seaward side.
This makes it’s safer and easier for exploring the sharp coral crevices. It’s also easy access from the boat to the reef, and this is another reason why this Key Largo diving site is highly favored by those who are planning a Florida Keys snorkeling trip. via Florida Keys Vacation
Grecian Rocks Key Largo Wiki
Grecian Rocks is a coral reef located within the Florida Keys National Marine Sanctuary. It lies to the east of Key Largo, within the Key Largo Existing Management Area, which is immediately to the east of John Pennekamp Coral Reef State Park.
This reef is within a Sanctuary Preservation Area (SPA). Grecian Rocks are south of Dry Rocks, a smaller reef. (Wikipedia)