11.   At the peak, where the giant cables loop down close to the roadway, there is a sign marking the boundary between the two states.

12.   All that was needed was strips of black plastic cable casing on telephone poles to mark the boundary.

13.   Farther north, clouds and areas of light snow will occur near a front marking the boundary between relative mild air and the Arctic air covering most of Canada.

14.   Four sacred mountains, one for each direction, mark the boundaries of this mythological world.

15.   From the height of land achieved, you can see similar fences marking field boundaries to the eastern and western horizon.

16.   He played in the street, using cones and T-shirts to mark boundaries.

17.   Now, the ribbon of water that marks the boundary between Texas and Mexico no longer runs to the Gulf of Mexico.

18.   Not long after, we began a steep climb to the top of a chain of low mountains that marks the boundary between Quebec and Labrador.

19.   Pheromones also help animals communicate danger, mark territorial boundaries or indicate sexual interest.

20.   The boundary itself is marked by a crude stone tablet, with an ornate gate on the Burmese side, flanked by two elephant statues.