So many to choose from. so let's see...
Maybe a Ginkgo, Maple or Golden Elm in their spectacular autumn colours, or an old mighty Beech Tree with its thick roots and smooth bark, or a Birch with its beautiful white bark and delicious sap, or a Willow blowing softly in the wind, or a Cherry, Apple, Peach, or other fruit Tree in its blossom, or a tall Spruce or Fir with snow on their branches, or... I can go on all day...
But if I really had to pick one, then I'd probably go with the Tree of Life. I hear its fruit is pretty good.