By Ali Karim

Sotano de la Golondrias and Xilitla

This post is part of a series called San Luis Potosi & Huasteca February 2016 Next morning, got up at 5AM, and by 5:30AM, we were on the way to the cave. This is actually a conical cave, with the top of the cave open (about 50m wide), and thousands of swallows nest inside the…

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