This small island located just off Sullivan Bay east of Santiago. Bartolome, a desolate island with few plants is the most visited and most photographed island in the Galapagos. The island consists of an extinct volcano and a variety of red, orange, green, and glistening black volcanic formations.

The best known of the island's features is Pinnacle Rock. This large black partially eroded lava formation was created when magma expelled from the volcano reached the sea. When the seawaters cooled the hot lava it caused an explosion. The exploded particles eventually  fasten together forming a rock composed of thin layers.