Iberian Peninsula | Wirral Peninsula | Cape York Peninsula | Mornington Peninsula | Peninsula Campaign | Malay Peninsula | Arabian Peninsula | peninsula | Korean Peninsula | Niagara Peninsula | Varna Peninsula | Antarctic Peninsula | Olympic Peninsula | Virginia Peninsula | Kamchatka Peninsula | Kenai Peninsula | Chukchi Peninsula | Sinai Peninsula | Kola Peninsula | Iberian peninsula | Gaspé Peninsula | Eyre Peninsula | Banks Peninsula | Baja California peninsula | Hel Peninsula | Delmarva Peninsula | Yucatán Peninsula | Liaodong Peninsula | Cotentin Peninsula | Cape Peninsula |
The harbor is sheltered from Massachusetts Bay and the open Atlantic Ocean by a combination of the Winthrop Peninsula and Deer Island to the north, the hooked Nantasket Peninsula and Point Allerton to the south, and the harbor islands in the middle.