A UNESCO World Heritage Site, the Parque Nacional Viñales is a beautiful, verdant valley in the Sierra de los Organos, north of Pinar del Rio. Steep limestone hills, called mogotes, slice through the valleys, creating a dramatic landscape. The valley floors in the Parque Nacional Viñales are agricultural areas where tobacco, fruit, and vegetables are grown. For outdoor enthusiasts, the park offers fantastic hiking and horseback riding in the hills. Nearby, the charming town of Viñales is a great base for exploring the surrounding area. Tour companies also offer day trips here from Havana.