A large monstrosity, such as an industrial site or high rise block of flats is spoiling my view.
For broadscale screening in a large space, an economical solution is to plant a solid green screen of fast-growing but well-behaved conifers such as Thuja plicata 'Excelsa' (Hedging) or Pinus nigra ssp. nigra , and plant a selection of deciduous trees in front to provide rich contrast and seasonal interest. For a more natural effect, space permitting, a mixed screen of ornamental conifers and deciduous trees can be planted.
For an average sized domestic garden, if screening in excess of 4 meters (approx 12ft) is required, a mixed planting of upright evergreen and deciduous trees is less dominating. For the evergreen element try Thuja plicata 'Excelsa' (Hedging), Calocedrus decurrens, Magnolia grandiflora ‘Goliath’ or Gallissonniere’, or Quercus ilex.