Fodor's Expert Review Parque Paleontológico Bryn Gwyn

Just south of Gaiman the green river valley gives way to arid steppes where clearly visible strata reveal over 40 million years of geological history. Some 600 acres of these badlands—many of them bursting with fossils—make up the Parque Paleontológico Bryn Gwyn, a branch of the Museo Paleontológico Egidio Feruglio in Trelew. Guides lead you along the fossil trail, then you're left to wander freely through the botanical gardens of native Patagonian plants.