If you look hard enough, you'll find mathematics everywhere, even in nature. Photographer Rebecca Latson has photographed that geometry, both manmade and natural, during her national park visits and shows you how to see the obvious (and not-so-obvious) lines, angles, circles, arcs and ellipses to improve your compositions and create beautiful national park photos of your own.

When you visit national parks, do you find yourself focusing on a particular aspect of those parks? Maybe you are concentrating your photography on cactus blooms, or wildflowers, or the results of glacial geology, or a particular specimen of wildlife. What you are doing, in fact, is creating a theme to your national park photographic story. Photographer Rebecca Latson discusses themes and how they can improve your powers of observation as well as your photographic skills.

A fast-moving wildfire that started in Mexico and jumped the Rio Grande River caused extensive damage to historic buildings in the Castolon Historic Area of Big Bend National Park.