See below and scroll through for some lovely photos of trees by James Balog:

http://www.jamesbalog.com/portfolios/changing-forests/

Also for some eyewatering tree photos see National Geographic's lot here:

http://national-geographic.cafepress.com/art/s_trees

The October 2009 NG issue had a stitched photo of 84 images of a 1,500 year old Redwood, 300 foot high with climbers in the photo for perspective. Best stitched photo of a tree ever. Photo was by Michael Nichols.

http://ngm.nationalgeographic.com/re...gatefold-image

There was also a tv programme about the making of the photo too. short video here:

http://video.nationalgeographic.com/...-the-redwoods/