Barra Honda National Park lead us to an intricately large system of limestone caverns, which house a multitude of capricious forms and figures. Caves there today, were carved out by the action of rain filtering through the limestone for over 70 million years. • Hiking through system of limestone caverns. • Reef rocks constitute Barra Honda hill, of 300 meters tall. • See the flora and fauna of this place, you can see coatis, agoutis, anteaters and monkeys.