Symmetry is also used as a visual cue in the landscaping example below....
David Beaulieu
Examples of entryway symmetry.
Homeowners often wish to draw attention to house entries. A simple way to do so is to use symmetry. In the photo above, there are two house entries. Focus is granted to each entry through the use of symmetry. But taller shrubs flank the entry to the left, injecting some much-needed variation into this design.