Reading between the lines is easier than following the text.” : Lines and Geometric Shapes in Composition

As in the Henry James quotation, a photograph with leading line is a strong composition. 

In addition to diagonals and "S" curves you should look for other lines and shapes that can be used in the composition.  In the photo on the left, "Open Door" taken at Bent's Fort, Colorado, the floor, wall, timber pillars and rear wall form trapezoids and draws the viewer's eye to the open door.

Skylines of cities are a myriad of rectangular shapes.  This skyline view of downtown Houston is a composition of vertical lines.

 This photo of the Allen Center Sky-bridge is a mixture of vertical, horizontal and round shapes.

Jones Plaza at night reveals a mass of lines, shapes, and colors.

Allen Center Sky-bridge's circular shape makes it own composition as the viewer's eye moves around and around the structure.

The 25th of  April Bridge, Lisbon, Portugal, directly under it as the Crown Princess sailed out of port made a great composition of lines.