Average GPS coordinates for El Sumidero Postcode location: 18.683, -97.325. (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 (1):
>> Veracruz Llave, 91215 El Sumidero, Xalapa, GPS coordinates: 18.6833,-97.325