After lunch, sail to Mosquera Island This island consists of a long narrow stretch of white sand, rocks, and tide pools. Created by geological uplift, Mosquera has a flat look to it rather than the conical shape of the volcanically formed islands. It is a great place for snorkeling, strolling on the beach, and enjoying the wildlife. It is home to a huge population of sea lions and many shorebirds.
In the afternoon disembark in Espinoza Point on Fernandina. Take a hike to see lava flows, a colony of marine iguanas (nesting time: January to June), penguins, pelicans and colonies of cormorants, and lava cactus. Spend the rest of the afternoon snorkeling before boarding the boat for dinner.
After lunch, visit Tagus Cove, a port where whaling ships arrived and left their ships’ names in a cave in 1800. In the high part is Darwin Lake, a round salt water crater. Disembark and take a walk begins from the shore by a wooden stairway that rises to the dusty trail passing through Palo Santo Forest to reach the Darwin Lake. Continue on the trail around the lake through the dry vegetation zone and admire panoramic views the overlook both Darwin and Wolf volcanoes. Later, take a panga ride through the cliffs and observe the historical graffiti, penguins, flightless cormorants, boobies, pelicans and sally lightfoot crabs. Then enjoy snorkeling time in the cove.
In the afternoon, disembark and take a short walk around Chinese Hat observing lava tunnels, lava cactus, and Galápagos Sesuvium. Then take some time to swim and snorkel.
After lunch, visit Hacienda Primicias and see giant tortoises in their natural habitat. The tortoises are easy to spot, lumbering around eating grass and leaves and wallowing. Some highland birds, like cattle egrets, mockingbirds, finches or flycatchers can be seen here. After the hike return to the yacht for dinner and briefing for next day.
In the afternoon, head to the Arnaldo Tupiza Breeding Center. This center has a captive breeding program for tortoises from the populations of southern Isabela. Then visit Humedales for a short hike. This area is characterized by sandy beaches, rocky shores, and mangroves. The area has a number of trails where you can see all four species of mangroves found in Galapagos and also migratory birds: whimbrel, short-billed dowitcher, wilson’s phalarope, common tern, blue-winged teal, osprey, black-bellied and semipalmated plovers, greater and lesser yellowlegs to name a few. Afterwards, take a bus to the Wall of Tears. The wall was constructed between 1946 and 1959 while Isabela was a penal colony. As punishment the prisoners were forced to build the wall from huge blocks of lava. The wall is named for the many convicts that died while building the wall. Then board the boat for dinner.
Rabida is a birdwatcher's delight. Some of the rarest species are in abundance on this island, such as nine varieties of finches, Large-billed Flycatchers, Galapagos Hawks and Brown Pelicans.
After lunch, sail to Cerro Dragon on Santa Cruz Island. Take a walk to a hypersalinic (saltier than the ocean) lagoon behind the beach, often frequented by flamingos, common stilts, pintail ducks and other species of birds. Then take a short walk to the hill, which offers a great view of the bay and a nesting site of land iguanas. Many of the iguanas that nest here have been repatriated by the Charles Darwin Research Station.