Underground cave discovered in Benalmádena

Eight-metre diameter cavity unearthed

by Lorraine Williamson
Benalmádena cave

During routine maintenance work in Benalmádena, Costa del Sol, workers uncovered an untouched underground cave measuring eight metres in diameter. The discovery was made on Avenida Retamar as part of a project to install a new water pipe.

The collapse of the cave’s vault exposed the substantial cavity, prompting authorities to halt work temporarily for further investigation.

Speleo-archaeological investigation ordered

Benalmádena City Council immediately commissioned a speleo-archaeological investigation to understand the cave’s origins and significance. “There was no prior documentation of the cavity, and no access was initially available,” said José Luis Bergillos, a city councillor. “It was essential to calculate its dimensions and assess its impact on the surrounding buildings.”

A natural phenomenon

Preliminary findings confirmed that the cavity is a natural formation created by underground water flows. Bergillos stated, “The research shows no evidence of human presence in the cave, ruling out the need for extensive archaeological studies.” This finding allowed authorities to proceed with necessary safety measures and resume construction work.

Safety measures and resumption of work

After stabilising the site and ensuring adjacent buildings were not at risk, the cavity was filled to eliminate further danger. Work on Avenida Retamar and Avenida Juan Luis Peralta has since resumed. The area remains part of a limestone-rich region with numerous underground water streams, making such formations relatively common.

Context of the discovery

Benalmádena’s location within a geological zone rich in limestone increases the likelihood of uncovering similar cavities. These natural phenomena, caused by water erosion, often remain undetected until construction projects or other disruptions expose them.

Community impact and future monitoring

The discovery underscores the importance of careful planning and monitoring during infrastructure projects in geologically sensitive areas. While the cave’s formation posed no immediate threat to human safety, its unearthing serves as a reminder of the complex natural systems beneath Benalmádena’s urban landscape.

Authorities have committed to maintaining vigilance in future projects to ensure both public safety and the preservation of any potential geological or historical features.

Also read: Spanish Civil War shelters discovered in Valencia

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