Hidden Valley is a quiet limestone valley near the better-known Ninh Binh cave and boat-trip sights. A short cave walk leads past stalactites, shell fossils, and rural views with far fewer visitors than the main circuits.
Hidden Valley is a quiet limestone valley near the better-known Ninh Binh cave and boat-trip sights. A short cave walk leads past stalactites, shell fossils, and rural views with far fewer visitors than the main circuits.