New Zealand Ghosts & Other Haunts

Was just looking through some pics on my computer and came across this one, I don't know too much about the history of the place but I thought that I would post it up.

That's a very nice orb.

Im picking a big old dusty.

It's really difficult to say what it is. I had a look at the enlarged version but it isn't large enough to examine the object in detail. Dust particles and/or flying insects can appear as orbs and at your orb would appear to fall into this catergory however as mentioned the image is far too small to make a proper analysis. Cheers!