The island of Bonaire began its life as a seamount – an underwater mountain formation hidden beneath the ocean’s surface. This changed around 60 to 70 million years ago, when the mountain began to rise above sea level. As such, a large portion of the island’s surface layer consists of fossilized reefs and calcareous reef deposits. In time, these limestone formations were dissolved by rainwater, creating the caves Bonaire has today. Barcadera Cave is one of them.

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