Fog can produce unique images. I often take a look at the the morning weather forecasts for dew point and temperature to see if fog is a possibility. When it is, I'm ready to go! Here are a few examples.

Sun burning through the fog
Sunrise fog
Fog along Medicine Creek
Sonoma fog
Sunrise fog over valley trees
Palouse with morning fog
Coast of Oregon fog
Island of Mon fog
Monterey fog
Moro Bay fog incoming
Fog, barn in background
Fog along a fence
Fog, three cows in the valley
Sunrise fog with spiderwebs in the meadow