| MX 31 Frontera latitude 18° 36' 46.5" N longitude 92° 41' 18.8" W This lighthouse marks the entrance to the Río Grijalva, a major river that has created a small delta called Punta Frontera. Located on the east side of the entrance, about 8 km northwest of the city of Frontera. photo ARLHS # MEX-173 No photo available
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