A library in a monastery in Tibet. It was discovered in 2003, behind a sealed wall, containing 84,000 hand written sutras and scrolls telling the history humanity back 10,000 years. They were written in Sanskrit, Chinese, Tibetan & Mongolian.
If I ever become pregnant, I'm going to throw a gender reveal party and reveal that gender is a social construct. I will have slides, and there will be a quiz.