Parts of the Great Wall of China were made with sticky rice.
Alexander the Great encouraged his men to shave so enemies couldn't grab their beards during battles.
The first American woman to go to medical school was admitted as a joke. Geneva Medical School thought it was joke when Elizabeth Blackwell applied to attend 1847. She graduated in 1849, started her own practice, and opened an infirmary for the poor.
LEGO has an underground vault with every set ever made.