Home of the famous Pinnacle Rock, Bartolome Island consists of an extinct volcano with a variety of red, orange, black and even green volcanic formations. The island was named after lieutenant Bartholomew James Sulivan, a sailor on Darwin's ship the HMS Beagle.  A trail of stairs leads to the summit of the volcano, boasting one of the best views of the islands. The beach is perfect for snorkeling and possible sightings of the Galapagos Penguin.