Old Maps of San Juan for Metal Detecting
Plan your next treasure hunt with 44 historic maps of San Juan. Find old homesites, ghost towns, trails, and gathering spots that may be lost to time — perfect for identifying promising metal detecting locations.
- Locate forgotten sites: Uncover places like long-lost settlements, abandoned rail lines, or gathering spots.
- Plan better hunts: Use map overlays combined with LiDAR or satellite views to narrow in on historically rich areas.
- Made for detectorists: Thousands of hobbyists use these maps to discover relics, coins, and hidden history.
Use these historic maps to boost your research and find new opportunities beneath the surface of San Juan.
San Juan maps
(44)- 1940 Map of Carolina
1940 Carolina1940 Print · USGSNortheast Puerto Rico is shown here just before the era of rapid modernization, when sugar production dominated the coastal plains. Researchers can trace the layout of agricultural colonies like Colonia Monserrate and historic centers such as Loiza Aldea and Central Victoria. - 1941 Map of Bayamon
1941 Bayamon1941 Print · USGSBayamón and the northern coast of Puerto Rico appear here in the early 1940s as a landscape of sugar centrales and rail lines. Genealogists and historians can trace family locations through numerous named colonias and landmarks like Central Juanita, Colonia La Monserrate, and Iglesia Cristo Rey.2 unique versions available - 1941 Map of San Juan
1941 San Juan1941 Print · USGSSan Juan and its surrounding municipios are captured here in the early 1940s, showing the capital's expansion before the post-war industrial boom. Researchers can trace the layout of early suburbs like Hato Rey, locate landmarks like the Universidad de Puerto Rico, or study the historic fortifications at Morro Castle.2 unique versions available - 1941 Map of Carolina
1941 Carolina1941 Print · USGSCoastal Puerto Rico at the start of the 1940s shows a landscape of sugar centrales and traditional settlements along the Atlantic. Researchers can trace family ties at Loiza Aldea, locate the rail spurs of Central Victoria, or explore the limits of the Bosque Insular de Piñones. - 1946 Map of Aguas Buenas
1946 Aguas Buenas1946 Print · USGSAguas Buenas and the surrounding central highlands appear here in the mid-forties, showing the intricate network of mountain roads and rural settlements. Genealogists and historians can locate specific landmarks like the Leprocomio, Pueblo Seco, and several local Escuela Segunda Unidad schools.3 unique versions available - 1947 Map of Carolina
1947 Carolina1947 Print · USGSNortheast Puerto Rico is documented here in the late 1940s as a landscape of coastal lagoons and thriving sugar centrals. Genealogists can trace family roots through numerous worker settlements like Poblado Sabana Abajo, Colonia Las Delicias, and Loíza Aldea.3 unique versions available - 1947 Map of Aguas Buenas NO
1947 Aguas Buenas NO1947 Print · USGSThe mountainous interior of Puerto Rico is captured here in the late 1940s, showing the early footprints of development around Guaynabo. Researchers can trace the layout of rural schools like the Escuela Segunda Unidad de Caimito or locate historical settlements like La Muda and La Esperanza. - 1947 Map of Bayamon
1947 Bayamon1947 Print · USGSBayamon and the San Juan coastline are seen here in the late 1930s as a landscape of sugar central mills and coastal colonies. Researchers can trace the American RR line to Central Juanita or locate old community anchors like Pueblo Viejo and El Cañuelo.4 unique versions available - 1947 Map of Aguas Buenas NE
1947 Aguas Buenas NE1947 Print · USGSPuerto Rico's interior highlands near Trujillo Alto are captured here in the late 1940s as a landscape of rural settlements and winding rivers. Researchers can locate specific structures in Pueblo Seco and trace the paths of the Río Grande de Loíza or the grounds of the Leprocomio. - 1947 Map of Aguas Buenas SE
1947 Aguas Buenas SE1947 Print · USGSCaguas and the surrounding river valleys are captured in the late 1940s as the regional landscape balanced traditional agriculture with emerging infrastructure. Researchers can trace rural school locations like Escuela Segunda Unidad de Rio Canas and the courses of the Rio Grande de Loiza and Rio Bairoa. - 1947 Map of Aguas Buenas SO
1947 Aguas Buenas SO1947 Print · USGSAguas Buenas and the surrounding highlands are captured here in the late 1940s, showing the town and its rural outskirts before modern development. Genealogists and hikers can trace old routes near La Changa or follow the waters of Rio Bairoa and Rio Caguitas. - 1947 Map of San Juan
1947 San Juan1947 Print · USGSSan Juan is captured in the mid-forties as it expands from the historic islet toward the inland hills and the university grounds. Genealogists and historians can trace early neighborhoods like Barriada Eleanor Roosevelt and landmarks such as Las Ruinas de Caparra and the American Railroad.3 unique versions available - 1949 Map of San Juan, 1952 Print
1949 San Juan1952 Print · USGSSan Juan and its surrounding barrios were undergoing significant expansion during the late 1940s as urbanization pushed south and east from the old city. Genealogists and historians can trace institutional landmarks like the Universidad de Puerto Rico, the historic walls of Fort Brook, and neighborhood developments in Barriada Eleanor Roosevelt.2 unique versions available - 1950 Map of San Juan SE
1950 San Juan SE1950 Print · USGSMid-century San Juan reveals a landscape in transition as the university district expands and new infrastructure emerges near the coast. Researchers can trace early urban development in Río Piedras, locate the Aeropuerto Internacional site, and find legacy landmarks like Hipodromo Las Casas. - 1950 Map of Bayamon NE
1950 Bayamon NE1950 Print · USGSThe shoreline of Toa Baja and Cataño is captured here at mid-century as the harbor area began its modern expansion. Researchers can trace the wetlands of Ciénaga de los Cucharillas or locate the historic El Cañuelo (Ruinas) and Palo Seco. - 1950 Map of San Juan SO
1950 San Juan SO1950 Print · USGSSan Juan's southwestern suburbs were undergoing a massive transformation at mid-century, transitioning from rural barrios to major urban hubs. Genealogists and historians can trace family roots through emerging neighborhoods like Barriada Eleanor Roosevelt and institutions such as the Sanatorio Insular. - 1950 Map of Carolina SO
1950 Carolina SO1950 Print · USGSMid-century Carolina and its surrounding barrios are captured here during a shift from sugar production to aviation. Trace the early layout of Carolina near the Central Victoria mill and the planned International Airport. - 1950 Map of San Juan NE
1950 San Juan NE1950 Print · USGSThe San Juan coastline and its expanding eastern suburbs are captured here at a pivotal moment of development. Trace the early footprint of the Aeropuerto Internacional and find local landmarks like Colegio del Sagrado Corazón or the Cementerio Buxeda. - 1952 Map of Aguas Buenas, 1953 Print
1952 Aguas Buenas1953 Print · USGSAguas Buenas and the surrounding central highlands of Puerto Rico are mapped here during a period of steady mid-century growth. Researchers can trace family sites near Barrio Bairoa or locate community centers like the Escuela Luis Santella and Leprocomio.2 unique versions available - 1955 Map of Aguas Buenas, 1956 Print
1955 Aguas Buenas1956 Print · USGSThe area surrounding Aguas Buenas is captured in the mid-fifties, showing the region before the extensive growth of the San Juan metro. Genealogists can trace family footprints through historic barrios like CAIMITO and CUPEL or locate old school sites like Escuela Segunda Unidad de Río Cañas. - 1957 Map of Aguas Buenas, 1959 Print
1957 Aguas Buenas1959 Print · USGSAguas Buenas and the surrounding highlands are captured in the late fifties as the region's hydroelectric and communications infrastructure expanded. Researchers can trace family-named barrios and landmarks like Saint Just, Escuela Daniel Diaz, and the Leprosomio near the banks of Lago Loiza. - 1957 Map of Carolina, 1959 Print
1957 Carolina1959 Print · USGSNortheastern Puerto Rico is captured in the late fifties as sugar mills and new transit hubs like the Aeropuerto Internacional reshaped the coast. Trace the Rio Grande de Loiza past the Central Canovanas and the local post office at Loíza. - 1957 Map of Bayamon, 1959 Print
1957 Bayamon1959 Print · USGSBayamón and its coastal surroundings are captured here in the late fifties, showing the area as industrial centers and new suburbs began to reshape the landscape. Researchers can trace family roots in Pueblo Viejo or locate landmarks like Central Juanita and Isla de Cabras. - 1957 Map of San Juan, 1959 Print
1957 San Juan1959 Print · USGSSan Juan and its surrounding barrios are seen here in the midst of mid-century modernization, from the old city walls to the emerging international airport. Genealogists and historians can locate family sites across Santurce, the grounds of the Universidad de Puerto Rico, and historic landmarks like La Fortaleza. - 1963 Map of Carolina, 1965 Print
1963 Carolina1965 Print · USGSThe coastal area east of San Juan comes to life in the early sixties, showing the vital waterways and growing barrios of the north shore. Genealogists and historians can locate family landmarks from Loiza Aldea to Canóvanas, including the Escuela Santa Catalina and the Hipodromo El Comandante.
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