Water, any water will do.
Being in water, preferrably warm water does it for me.
Swimming in the sea and feeling my body float.
Having the shower play with my skin. 
Going down a water slide. 
But watching water is also a treat. 
Seeing the moonlight reflect on the sea or a lake. 
Seeing a water lillie float on the water. 
Water is what nature feature I like best, dear Lance and Kristin.