The National Geographic Sea Lion entered the Osa Peninsula this morning in very calm waters to Caletas Beach. Our expedition landing craft took us nicely to the shore where we began our day.

Hikers headed into the moist tropical forest, where some of them saw a troop of mantled howler monkeys sitting quietly in the dense canopy.

We witnessed immense lines of leaf cutter ants trailing back to their nest, which appears to be near the river. On our short walk along the beach we successfully spotted scarlet macaws perching up high on the forest canopy and others bird species such as common black hawk and white neck puff bird were also seen.

Later in the morning we had a chance to peacefully swim in Caletas Beach.

We repositioning the ship to Corcovado National Park which is one of the most pristine national parks in Costa Rica and extends nearly 112,000 acres. We all chose to take the Pedrillo waterfall hike. We found a boat billed heron hidden in the forest gallery camouflaged in the mangroves.

We saw the incredible features of the very mature rainforest in the park as well as other glimpses of wildlife, including Central American spider monkeys, the biggest primates in the new world, actively moving in the canopy.

Our reward was refreshing—the waterfall pool for our guests. Everyone took a splash in it and had a little swim in a tropical pool. The tide came up which makes it easier for our expedition landing craft to cruise back to the ship to National Geographic Sea Lion. We finished our day with a wonderful recap session.