41.   Federal Hill, accessible by a steep trudge, provides a dramatic view of the harbor from the south.

42.   Even worse is the frustrating effort to find an obscure bit of information that is, in theory, accessible by a search engine.

43.   For one thing, it is accessible only by air or sea.

44.   For our week at Big Bend, we stuck to primitive campsites accessible by car.

45.   From pristine whitewater full of wild trout and salmon to broad flatwater accessible only by floatplane, the fishing is as varied as it is wild.

46.   He has no need for modern conveniences, living in a primitive cabin on the Trinity that is accessible only by boat and has no telephone.

47.   He noted that it is within driving distance of Oklahoma City and accessible by air from most cities without changing planes.

48.   His grandfather helped build the remote cabin, which is accessible only by boat.

49.   Hundreds of macaws and parrots can be seen in the rain forest that is home to the Tambopata Research Center, accessible by plane and motorized canoe from Lima.

50.   In their boyhood home they created a secret room under the staircase, hidden from their parents and accessible only by a trapdoor.