Embark the Darwin Yacht and meet the Captain and crew. In the afternoon, visit the high part of Santa Cruz Island, “Los Gemelos” or “The Twin Pit Craters”. They are, geologically speaking, seen as craters but their formation is not directly due to volcanic action. Rather they were created as a result of the collapse or sinking of surface materials into cracks or manholes. In 1989 a circular path around the largest crater was opened, which passes through the interior of the Scalesia forest, an excellent place to observe land birds, especially the woodpecker finch and the vermillion flycatcher. Another plant that draws attention is the Galapagos guava or guayabillo tree, Psidium galapageium, which has a clean and smooth bark and branches covered with epiphytes and brown liverworts.
Next head to Espumilla Beach on the northern coast of Santiago Island in James Bay. The main attractions here are a palo santo forest, beach, and the landscape. The beach is an important site for nesting marine turtles (Chelonia midas agassizi).
In the afternoon go to Sullivan Bay, located southeast of Santiago Island. This site is of great geological interest. The landing can be performed either on the rocky shore (dry landing) or the white sand beach (wet landing). The length of the trail is approximately 1.5 km; travel time is one hour and a half. The area is covered by Pahoehoe lava flows (solidified lava in corrugated or accordion form). It was very active in the last 25 years of the nineteenth century - the Sullivan lava formed in 1897 and is geologically very young. The magma formed is flat, but the movement of underground lava, the rapid cooling and other eruptions led to the break in many places.
Transfer to the Baltra airport for your flight back to the mainland.