so im roaming around and i get the unshaded in triangle on my map marker so i go to follow it and it dissapears after a little while
so im wondering how many locations there are just to see if ive found them all?

and also a second question ive got does anybody know the six caves with the terminals with the sort of diary/survial logs on them. ive found 5 and stuck on the 6th

Iv been waiting for someone to reply cos I'm having the same problem.

http://fallout.wikia.com/wiki/Category:Honest_Hearts_locations