Harbour Island is not a city but rather a small island located in the Bahamas. It is known for its beautiful pink sand beaches and is a popular tourist destination. The island is part of the Eleuthera archipelago and is accessible by ferry or private boat from North Eleuthera. While there is no specific city on Harbour Island, it is home to several settlements, including Dunmore Town, which is the main settlement and offers restaurants, shops, and hotels for visitors.