Good contrast and a hint of low fog puts the viewer next to you.

The small tree all by itself creates the impression of loneliness and isolation.

Fall is a good time to find fog and a lone subject helps bring out the overall feel.

An air of mystery can be felt on a foggy morning.

Getting above the fog is another way to use fog as a mood element.

Light hitting the subject and dark clouds bring out the drama of the impending storm.

A long exposure makes for a relaxing feel of the water running over the rocks.

A hint of snow on the ground and frost on the trees contrast nicely with the crisp blue sky.