Saguaro Forest

At the visitors center of the Saguaro National Park West, you can see one of the most dense "forests" of Saguaro Cacti there is.

 With a little bit of telephoto compression it really makes it seem like there's no room for anything but Saguaro Cacti in the desert.  This image was taken with my 75-300mm lens at 150mm focal length and an exposure of 1/6000 seconds at f/5, ISO 200.

There aren't just lots of cacti in this area, but many beautiful multi-armed cacti as well like this one, taken at 75mm focal length with an exposure of 1/4000 seconds at f/5, ISO 200.