Slave Watchtower Trinidad Sugar Plantation: “Manaca Iznaga” Pedro Iznaga built a sprawling hacienda in the middle of the San Luis Valley with the fortune he made from the slave trade. He erected a 44-meter high watch tower with 184 steps, some 50 meters from the main house, to control the slaves who were more than willing to escape. He would also mark the hour by tolling a bell. The vernacular and industrial-style tower has become a symbol of this legendary region, despite its contrast with the surrounding area. It does in fact allow for a panoramic view of Trinidad.