Where can a calendar featuring images of nature be purchased?

The easiest way to find calendars with nature images would be to head to your local bookstore such as Barnes and Noble, Book World and Half Price Books or any "Mom and Pop" store in your town. 12-month and in some cases even 16-month calendars can be found here from prices ranging between $10-$15. They can also likely be found at places such as Wal-Mart, Target and even your local grocery store.