Colombia’s Sierra Nevada de Santa Marta range rises more than 18,000 feet from the Caribbean Sea — a height that makes them the tallest coastal mountains in the world. The national park that houses them is also the world’s most irreplaceable protected area for the conservation of threatened species, according to a new report.

The park rose to the top of the analysis based on the diversity of plants and animals found only there, including a critically endangered harlequin frog and more than 20 birds. It is one of 134 protected areas in 34 countries highlighted as “exceptionally irreplaceable” by the analysis of 173,000 protected areas.