So you guys want to know where I was born. The Final Clue

The other day I had a weird dream...

My sister, Patricia, and I were little girls and were back in the place where we had been born.

We were standing in the middle of nowhere, all alone, but there was a sign next to us telling the distance (1.2 km) to the highest mountain in the country, whose top I could see perfectly align with the top of Patricia's head, right behind her.

In the dream, Pa was wearing her school uniform. Therefore, she much have been a bit older than four, and I must have been barely three. But, somehow, she looked much taller than me; actually, nearly a foot taller (big sisters do tend to look rather imposing when you are a little kid, don't they?).

Anyway, just when I was expecting something to happen, the alarm clock went off, and I woke up. And then I realized that if I told you that in the dream we were standing 28" apart, doing a little bit of math you would be able to find out where we were. So, there you have it...