Hi Lance and Kristin,
For me it is mountains... Growing up in NYC it is interesting to me that all my drawings as a child were of a house with mountains in the background touching the sky. Now I live where I can see that view out my window and there is something that makes me sigh every time I see them.  Perhaps it is the sheer beauty and how they always reflect the seasons, or the fact that it makes me realize I am just a SMALL part of this beautiful planet. It might be the connection I feel as I look up to them and to the sky above and the Universe as a whole.  Whatever it is I am always in awe when I look and them and humbled by their beauty.  I love many other things in nature; woods, gardening, flowers, rivers, trees, the sun, the moon but mountains are probably my favorite and the one that fills me with the most joy. Thank you for this!
Much love, Jenny