Land at Punta Espinoza, Fernandina Island, where recent lava flows formed by an active volcano stretch their way around the coast. Hundreds of marine iguanas, the largest colony in Galapagos, bask in the sun along the rugged shoreline and we'll observe them both underwater and above the surface. Dominating the scene is towering Las Cumbres volcano (4858’), one of the most active volcanoes in the world. After lunch, we cross the Bolivar Channel to Urbina Bay on Isabela. You may observe nesting brown pelicans, flightless cormorants, giant marine iguanas and giant tortoises who inhabit this area. Sail through the Bolivar Channel, a great place for sighting whales and dolphins, before landing at Tagus Cove, used historically as an anchorage for pirates and whalers. From our landing, a wooden stairway rises to the trail entrance for a view of Darwin Lake, a perfectly round saltwater crater. Visit the northwestern most point of Isabela Island, Punta Vicente Roca where Nazca and blue-footed boobies as well as brown noddies may be seen perched along the point and the sheer cliffs. Overnights on the Grace.