Which island is cryptically called the Danish Garden?, the island nicknamed “Garden of Denmark” is Funen (Fyn in Danish). This nickname is given because of the beautiful nature and landscapes of the island. Funen is Denmark’s third largest island and is known for its green meadows, mountains and picturesque villages, making it an idyllic destination for nature lovers. The island is also famous as the birthplace of the famous Danish fairy tale writer Hans Christian Andersen.