This is the third largest, the youngest and westernmost island in the Galapagos. Many eruptions have been recorded since 1813, making this island most likely to have volcanic eruption in the world. Puerto Espinosa, across Tagus Cove, is a visitor’s site where some of the unique species of Galapagos can be seen. Marine iguanas conglomerate in large groups. They bask around in the sand, swim near the shore and block the way at the landing dock.