I found this link elsewhere and so I am sharing. I am going to try to categorize links that folks share in the comments as we go. Share away!
New York Gangs
Views of New York
Subways of New York
- This would be an incredible place for a big-bad to live: http://www.huffingtonpost.com/2010/11/10/the-hidden-abandoned-city_n_781...
- Some great photos here. Look in "abandoned stations": http://www.nycsubway.org/
- Digital Orrery http://dd.dynamicdiagrams.com/wp-content/uploads/2011/01/orrery_2006.swf
- Sunrise/Sunset/Moon Phases: http://www.sunrisesunset.com/custom_srss_calendar.asp
- All Things Philosophical about BtVS - http://www.atpobtvs.com/
- Amazingly comprehensive! http://disparue.org/gallery/