51.   In the decades before tourists played chicken in their cars while looking for parking, Grand Canyon National Park was mainly accessible by train.

52.   In the northern state of Chihuahua, the Tarahumaras live on the plateaus of the Sierra Madre mountains accessible only by narrow dirt roads.

53.   Information, in many guises and in more intimate detail than ever, is stashed in odd places, accessible by licit and illicit means.

54.   It is a giant photograph of a tiny model of a stockroom, filled with identical boxes tucked in identical cubbyholes, accessible by a toy steel ladder.

55.   It is not open to the public and is accessible only by water.

56.   It is accessible by boat.

57.   It is accessible by hiking or biking through five miles of the Back Bay refuge.

58.   It is accessible by public transportation, used by most of the young men.

59.   It is also accessible by bike from Arguello Boulevard.

60.   Its communities are accessible by one or two car ferries, depending how far one wants to travel.