When I was 16 years old, I travelled to North Queensland with my sisters. This was a significant trip as: it was the first time I travelled*; first time that I stayed at a hostel; and I had paid the entirety of the trip which was a big deal as I was only earning $6/hr at the time.
My recollection of the trip was sparse and that had always bothered me. Imagine visiting one of the most famous places in the world - Great Barrier Reef- and having effectively 0 memories of the entire experience.