The Collaborative International Dictionary of English v.0.48:

Vista \Vis"ta\, n.; pl. Vistas. [It., sight, view, fr. vedere,
   p. p. visto, veduto, to see, fr. L. videre, visum. See
   View, Vision.]
   A view; especially, a view through or between intervening
   objects, as trees; a view or prospect through an avenue, or
   the like; hence, the trees or other objects that form the
   avenue.
   [1913 Webster]

         The finished garden to the view
         Its vistas opens, and its alleys green.  --Thomson.
   [1913 Webster]

         In the groves of their academy, at the end of every
         vista, you see nothing but the gallows.  --Burke.
   [1913 Webster]

         The shattered tower which now forms a vista from his
         window.                                  --Sir W.
                                                  Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vista
    n 1: the visual percept of a region; "the most desirable feature
         of the park are the beautiful views" [syn: view,
         aspect, prospect, scene, vista, panorama]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "vista":
   airscape, cityscape, cloudscape, command, domination, eyereach,
   eyeshot, eyesight, field of view, field of vision, horizon, ken,
   landscape, limit of vision, line of sight, lookout, naked eye,
   outlook, outlook over, panorama, perspective, prospect, range,
   riverscape, scan, scape, scene, scenery, scenic view, scope,
   scope of vision, seascape, sight, sightliness, skyscape, survey,
   sweep, townscape, view, waterscape



U.S. Gazetteer Places (2000):

Vista, MO -- U.S. village in Missouri
   Population (2000):    55
   Housing Units (2000): 24
   Land area (2000):     0.131145 sq. miles (0.339664 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.131145 sq. miles (0.339664 sq. km)
   FIPS code:            76390
   Located within:       Missouri (MO), FIPS 29
   Location:             37.988824 N, 93.664037 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Vista, MO
    Vista


U.S. Gazetteer Places (2000):

Vista, CA -- U.S. city in California
   Population (2000):    89857
   Housing Units (2000): 29814
   Land area (2000):     18.681240 sq. miles (48.384187 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    18.681240 sq. miles (48.384187 sq. km)
   FIPS code:            82996
   Located within:       California (CA), FIPS 06
   Location:             33.193549 N, 117.241140 W
   ZIP Codes (1990):     92083 92084
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Vista, CA
    Vista