You would get more than your daily dose of vitamin C, or ascorbic acid, if you were to eat this castle made of lemons and oranges! It was built to celebrate the Lemon Festival in Menton, France, this spring. Many animal species make their own vitamin C, but humans, primates, guinea pigs, bats, and a few other animals lack the enzyme responsible for vitamin C production, so we need to get our daily dose from citrus fruits or vitamin supplements. When you don't get enough of this important vitamin, you contact a disease called scurvy. Historically, sailors and pirates usually suffered from scurvy because they spent long voyages aboard ships without access to fresh fruit.