Tagus Cove is bordered by a steep rocky coastline and has for centuries offered shelter for ships and yachts. The cove is named after the British frigate HMS Tagus visiting the Galapagos in 1814. Already by the 1830s other ships had their visits recorded by painting or scratching their nameonto the rocks. On approach Galapagos Penguins and Flightless Cormorants –both birds mainly found on Isabela’s west coast and neighboring Fernandina- are often seen. From the landing a trail through an incense tree forest leads past Darwin Lake to a viewpoint on top of a spatter cone. During the hike several land birds including Medium Ground-Finches, Galapagos Hawks, Yellow Warblers as well as Large-billed Flycatchers are often present. Brown Noddies and Blue-footed Boobies prefer the rocks along the shore.
The impressive Pahoehoe lava field lies between two active volcanoes, Sierra Negra and Cerro Azul, on the south coast of Isabela Island. The rich waters of Cromwell Current wash the shores, and as a result, you can see the largest marine iguanas of the archipelago basking on the rocks, Flightless Cormorants and Galapagos Penguins diving for food. During the walk you will experience, as an oasis in a desert of lava, some coastal lagoons in the middle of the field, here you can find shorebirds such as White-cheeked Pintail Ducks, Black-necked Stilts and even sometimes Flamingos.
Elizabeth Bay is one of the marine sites on Isabela’s west coast. South of Alcedo Volcano and north of Sierra Negra, Elizabeth Bay is found at Isabela’s narrowest east-west extension where the lava flows of these two volcanoes have connected each other. Elizabeth Bay’s shores show mangroves and specifically the easternmost part, a cove which can only be entered via a narrow channel, has red, white and black mangroves. Different animals prefer different parts of Elizabeth Bay. Las Marielas, three rocks at the entrance to the bay, are favored by Blue-footed Boobies, Flightless Cormorants and Galapagos.