Inishowen Maritime Museum and Planetarium is a visitor attraction and event organiser based in Greencastle Co. Donegal. The museum houses numerous artefacts relating to the maritime heritage of Inishowen and the north west. Outside the museum are two memorials dedicated to those who lost their lives at sea. The building also has a planetarium which displays a number of shows daily in the summer months. In addition the Inishowen Maritime Museum has gift shop which provides high quality nautical gifts and local Inishowen arts and crafts. In the summer months the museum’s cafe is open, serving light lunches with a beautiful view over Greencastle Harbour.