Sightline (architecture)

In architecture and urban planning, sightlines or vistas are a consideration in the design of civic structures, such as a stage, arena, or monument. They may determine the configuration of architectural elements in theater and stadium design and road junction layout.

Many cities such as London and Paris designate visual axes in the layout of streets and squares to allow for views of famous landmarks (terminating vistas).

Subjects that have a line of sight with one another are said to be intervisible, where intervisibility is the ability of viewers at separate places to see each other without any landform blocking their view.