This is my todo.
Trains
edit- See where I can make contributions.
- San Francisco Municipal Railway Stations, with station templates.
Computers/Algorithms
edit- Geometry
- Line segment intersection - could there be some kind of example of scan line algorithm
Geography
edit- Mountains/Ranges
- Water
- Valleys
- Black Rock Desert
- Washoe Valley, Nevada -- maybe
Also check out notable places and info from USGS GNIS.