This Mexican Slasher flick is highly underrated, probably, only a few have seen in even in Mèxico! I rented it back when it was released (of course, straight to video) and it was truly creepy.
Three couples in their late twenties/early thirties drive up to a huge property in the Mexican woods. Alejandra Espejo (who sadly died last year), is very good in the lead role.
Watched this on Satellite cable last night. I don't speak Spanish, but my husband does and he loves these flicks.