Guatemala’s largest lake is a mostly undiscovered region. Of particular note are the Bocas del Polochic Wildlife Refuge [1], centered around the Río Polochic’s delta, and the 17th-century fortress of Castillo de San Felipe de Lara [2].
Links:
[1] http://www.moon.com/destinations/guatemala/el-oriente-and-izabal/lake-izabal/near-el-estor/bocas-del-polochic-wildlife-refuge
[2] http://www.moon.com/destinations/guatemala/el-oriente-and-izabal/lake-izabal/castillo-de-san-felipe-de-lara