The longest line in your garden is on the diagonal. Take advantage of it by placing you main garden path on the diagonal, making it as long as possible. A long path will make the whole garden appear bigger.
Path on the diagonal is longer 
Path placed straight is shorter
To trick the eye even more we’ve made the end of the path slightly narrower. Point A is only 65 cm (25 inch) wide while point B is 70cm (27 inch) wide. This adds to the perception of perspective making point A seem further away than it actually is when viewed from point B.
The main path in my garden is a wooden boardwalk but the idea of a diagonal path works with any any material.
