Expedition Day 1: Gatún Lake/Panama Canal Transit Today, choose hikes and Zodiac cruises at the Smithsonian Tropical Research Institute facility on Barro Colorado Island, or take a boat ride to the mouth of the Chagres River and hike on the Panama Rainforest Discovery Center trails. This evening, continue through the complex lock system of the canal. By special arrangement, National Geographic Quest will anchor in Gatún Lake near the Barro Colorado Nature Monument overnight.