The subtriangular-shaped Sugarloaf Island, or Isla Pan de Azúcar, lies a tantalizingly short distance offshore, its base often shrouded by camanchaca (thick fog) at twilight. It is home to about 2000 Humboldt penguins, as well as other birds, otters and sea lions. The island is a restricted area, but local fishers approach the 100-hectare island by boat for up-close-and-personal views.
Launches charge CH$5000 to 10,000 per person (depending on number of passengers, with a 10-person minimum) from Caleta Pan de Azúcar; in the low season, you could end up forking out as much as CH$50,000. Round trips take 1½ hours, and run from 10am to 6pm in summer, and to 4pm in winter. You'll have to sign up at the bay kiosk and wait for the next tour. Note that it is more difficult to round up enough people during the week; prepare to wait longer or pay more.
