In the morning visit the Sierra Negra Volcano, which is the largest basaltic caldera in the Galapagos with a diameter of 6.2 miles (10 km). The site offers impressive views and the opportunity to observe up to seven species of finches and a rich display of vegetation. The north side of the caldera provides evidence of its most recent volcanic activity in 2005. In the afternoon visit the Arnaldo Tupiza Breeding Centre which is located about one mile (1.5 km) from Puerto Villamil. Here, tortoise populations from South Isabela, Sierra Negra Volcano, Cerro Azul, Cazuela, Cinco Cerros, Roca Union, San Pedro, Tables and Cerro Paloma have been bred in captivity. In total there are 330 juvenile and adult tortoises.
Isabela Island (Galápagos)
Isabela (Albemarle) Island is the largest island of the Galápagos with an area of 1,792 square miles. Its highest point is Volcán Wolf at 5,600 ft. On this island, Galápagos penguins, flightless cormorants, marine iguanas, pelicans and Sally Lightfoot crabs abound. It is the only island to have the equator run through it. The main ports of call are Elizabeth Bay, Moreno Point, Urvina Bay & Tagus Cove. Vicente Roca Point is where the remnants of an old volcano have formed two turquoise coves and is rich in marine life - popular with divers and snorkelers.