Spanish Lake is located in the Bluff Swamp on the Iberville - Ascension Parish line. Early European settlers of the area that was developed as French and Spanish ancestry. Among the projects and plans carried out by Luis de Unzaga 'le Conciliateur' while he was governor of Louisiana between 1769 and 1777 was the promotion of new settlements by Eu…Spanish Lake is located in the Bluff Swamp on the Iberville - Ascension Parish line. Early European settlers of the area that was developed as French and Spanish ancestry. Among the projects and plans carried out by Luis de Unzaga 'le Conciliateur' while he was governor of Louisiana between 1769 and 1777 was the promotion of new settlements by Europeans, among them were French Acadians and Malaga in the fertile Mississippi region and more specifically in the Unzaga Post or 'Puesto de Unzaga' that he created in 1771 in Pointe Coupee, the parish of Saint Gabriel in 1773 and Fort Manchac in 1776.