Average GPS coordinates for El Sumidero Postcode location: 26.079, -102.025. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). El Sumidero on map:

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Listing cities & postcodes (2):
>> Chiapas, 29285 El Sumidero, San Cristobal de las Casas, San Cristobal de las Casas, GPS coordinates: 26.5917,-102.2167
>> Chiapas, 29480 El Sumidero, Tenejapa, GPS coordinates: 25.5667,-101.8333