I did some internet searching and brainstormed about all the ideas I could remember, so from the perspective of a Maryland resident, here is what I came up with for interesting photography:
- Wildlife is easier to spot in the winter. Try Blackwater National Wildlife Refuge in Cambridge MD for birds, including eagles
- Great Falls National Park sunrise
- Blackwater Falls State Park in Davis WV for winter evergreens
- Ice patterns on window glass or on water, ice on plants
- Icicles (I even tried catching the melting water with a star filter, but it takes lots of patience)
- Red berries on plants
- Snow photos of buildings and snow in landscapes like mountains, with water, blowing snow (use +1 or +2 exposure or a gray card)
- Storm photos right before or after a storm
- Fog photos
- Snowy buildings with warm light coming from windows
- Cityscapes at twilight 30 minutes after sunset or before sunrise-see http://www.date-and-time.net/ for a twilight calculator
- Caves are usually around 50-55 degrees year round
- Astrophotography when the sky is clear and less hazy
- Bryce National Park or Yosemite in snow
- Florida-Corkscrew Swamp, Big Bend boardwalk at Fakahatchee Strand, off Hwy 41 near Everglades city, Anhinga Trail near the entrance to the Everglades
- Indoor studio type shots with a photo tent or flash