The Black Rock

• Located in the "Dark Territory" (close to the Antenna)

Black smoke

• Appeared in the season one finale
• Located on the east coast (see screenshot)
• Approx. NE of the second beach camp

Danielle's hideout

• Sayid showed the area of Danielle Rousseau's hideout in S01E18 (see details)
• Located in the "Dark Territory" (according to Sayid)
• The Losties get to Danielle's hideout by crossing a plank bridge in S01E18 (see screenshot)
• The bridge may be located in the central valley