Ghost cams � hmm. A few years ago I would visit ghost cam sites to of course see what I could see.
I saw quite a lot I have to say. I don�t go to those sites anymore , but, because of your request for �ghost cams�, I went for a peruse.

Below is a link to many ghost cams � although I can not vouch for how good the majority are, as I have never visited them.

http://wintersteel.homestead.com/ParanormalWebCams.html

I will mention two cams I was a regular viewer of and describe some of my observations:

Ordsall Hall, Gt.Manchester UK � A very haunted, active old Tudor house with lots of visiting astrals. Lots of children ghosts playing around there and they can be quite mischievious! The place also has many nature type spirits. The painting in the Great Hall of an Elizabethan lady(thought to be one who previously lived in the hall)is quite cool to watch at night. It is covered in glass and so reflects very well. Many different spirits use it to be seen and that just goes on and on. ( 2 cams to watch).
This place was investigated by the Most Haunted team a few years ago. They regularly have overnight ghost vigils and you can watch what they do on the cams.
http://www.salford.gov.uk/leisure/museums/ordsallhall/ghostcam.htm

The next is a disused hospital in the US which is being used as a research place(paranormal) and there are about 5-6 cams to look at. Another very haunted active place, all kinds of phenomena have been seen and reported. The cams do come over quite grainy, so if your astral sight is not that good, you may be disappointed.My tips are : look at the end of the corridors, the astrals crowd there. check out the walls, as they often will show themselves in these areas. This place is very spooky.
http://www.researchwebcam.net/

Hope this information has been of some help.