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Micro in the black wall, near an edge, ca 0.5m from the ground.
Almost a drive-in.
The structures were built in the 1970's and it was designed to be a new resort on lanzarote with hotels nearby. The project hit the 1970's financial crisis and stalled. It never restarted. The hotel you can see is Club La Santa, a world class sports training resort. They now use the lagoon you see. The whole area is now a nature reserve and protected from development.
(Thx to pilot3372 for the information!)
(No hints available.)