The entire island is a large tuff cone. Daphne Minor, a tuff cone (giant pile of compressed volcanic ash shook like a cone), sits off the north coast of Santa Cruz Island, west of Baltra Island and North Seymour Island. There are no visitor sites on Daphne Minor or Daphne Major islands to be visited on a Galapagos cruise as it is almost impossible to disembark here. The islands only offer visitors some nice dive sites.