The Looking Glass

• First seen in S03E21 when Charlie and Desmond follow the cable into the ocean

The Arrow / Ana-Lucia's pit camp

• The location of the camp where Ana-Lucia digged the pit is 3 days (of continuous walking) away from the Tail crash site (stated by Bernard in S02E07).
• The Taillies need one day to get from the pit to the beach and another one to find the Arrow. Later, they seem to travel this distance in much less time (see S02E03).
• They go fishing at the beach (see screenshot), so it shouldn't be too far away from it (see S02E05).

Beechcraft/Pearl station

• Charlie and Sayid passed the beechcraft when they were after Danielle to get Aaron back (S01E24)

The hatch/Swan station

• About half a mile away from the caves (stated by Jack in S02E01)
• Mountains near the side entrance (see screenshot)