Valle de Los Ingenios (Valle de San Luis), Trinidad

This valley is literally a natural history museum for its conservation of the ruins of 12 sugar-mills from the 19th century. The plantation's large belfries, mills, huts, instruments for work and slave torture remain amid the aged trees and winding paths. In the San Luis Valley, renamed the Valley of Sugar-Mills, there are still vestiges of aboriginal culture, colonial architecture and the 19th century War of Independence, which marked the decay of this sugar emporium. By mid-19th century, greatly favored cities such as Trinidad were exporting up to one million arrobas (bundles of around 12 kilos). UNESCO has declared it a Cultural Patrimony of Mankind. Admission: Free