I went on the Fremantle prison tour, and had 3 experiences in the one tour that really freaked me out - on the same night...
the first one was in the death row courtyard - i knew that i was at the back of the group - but it felt like i had about 2 people standing mehind me - you know like in the crowds at the royal show? so i turned around, and there was definately nothing physical there..
the second was in the gallows - i really didn't want to go in, but when i did - i felt like something was around my neck strangling me - i couldn't breathe very well, so i had to get out of there, and as soon as i did - the strangling feeling stopped..
then the third, was when we were on either the 2nd or third floor, i saw a figure in a long black dress / coat in the corner, like the period style coats.. then when i turned to show my friend, and then turned back - they were gone.

i also know when my aunt is around me, because i have a warm feeling on my neck & shoulder, like she has put her hand on the back of my neck [around my shoulder type thing.]