Unpassable coast area

• Taillies could not pass this area in S02E06
  
• Probably the position of Desmond's boat (see screenshot)
• The brown rock surface might indicate that it's close to the crater
• Similar area passed by Rousseau, Kate, Locke, Jack, Hurley and Arzt in S01E23 on their way to the Black Rock (see Crater)
• Similar area passed by Charlie and Sayid in S01E24 on their way to get back Aaron (see Crater)