I was about five years old and living in Mexico. My mom used to work at a bridal shop. The shop was next to a candy store that my mom's friend owned.
One day I wanted to use the bathroom and my mom took me to the candy store because our store didn't have a bathroom. Her friend's wife let us use the bathroom and walked us all the way down the hall to the restroom. I walk in and was heading towards a stall when I see a bright white light. I start to hear lots of mumbling and soft whispering, as if someone was talking with a really low combination of white noise. I get an urge to look towards the sink, so I look and see a little girl standing in front of the window as if she was outside in an open space of land that is behind both stores.
She was about 6 years old, blond hair, white skin, blue eyes, dressed all in white, particularly a knee length puffy white dress (that is forever burned in to my memory). She raised her arm and did a "come here" motion with her finger. I could see her lips moving and the same whispering started again, as if she wanted me to go with her.
I screamed so loud my mom and her friend's wife came rushing in and I was in tears telling them that there was a girl in the bathroom. They checked the ground and no one was there.
Now as an adult, about two years ago my mom asked my grandma what that place was before the stores where built. Turns out it was a place where merchants that came from small towns could come in a spend the night and sell and store their horses. People came in sick as well so they think she might of passed away there.
I still feel her with me at times and that kind of scares me. It seems that after that experience, I have somehow become more sensitive to paranormal activity.