These provinces are all located in the part of the Netherlands that is in Europe. The country also includes three special municipalities in the Caribbean: Bonaire, Saba and Sint Eustatius. They are not part of any province, but together are known as the Caribbean Netherlands. The Netherlands (both the European part and the Caribbean Netherlands), together with Aruba, Curaçao and Sint Maarten, also in the Caribbean, form a sovereign state called the Kingdom of the Netherlands.