But why go through all the trouble of actually looking for places when you can pay for them (Paypal only)?
http://urbexdb.com/country.asp?code=US I clicked on one to see how much they would charge for a US location and evidently the going rate is a mere .... £2.50
Maybe if you buy them all at once, they'll throw in a bonus haunted(!) hospital, or better yet, a bulk discount rate.