Did you know watermelons are 92% water and you can eat the entire fruit!?
The website MentalFloss maintains:
While we tend to focus on the melon’s succulent flesh, watermelon rinds are also edible—as well as full of nutrients with surprising health benefits. In China, the rinds are often stir-fried or stewed, while in the South, cooks like to pickle them. And, across the Middle East and China, the seeds are dried and roasted (similar to pumpkin seeds) to make for a light, easy snack.
–Mental Floss