1958 Map of Cayo Icacos

About this map

Cayo Icacos and the scattered islands of La Cordillera define this maritime landscape off the northeastern coast of Puerto Rico during the mid-20th century. The topography, based on aerial photographs from 1941 and a 1958 revision, captures the intricate reef systems and cays that separate the Atlantic Ocean from the Sonda de Vieques. On the mainland at Cabezas de San Juan, the Faro de Cabo San Juan stands as a primary navigational landmark overlooking the Pasaje de San Juan. The map provides detailed hydrographic data, including soundings and depth curves, surrounding notable features such as Isla Palominos, Cayo Diablo, and Isla de Ramos. This survey documents the coastal geomorphology before modern development, recording numerous reefs like Arrecife Roncador and the protected waters of Laguna Grande.