10 Fun Facts About Everything In The World 1. The Kawah Ijen Volcano There’s volcano in Indonesia that spews blue lava. The Kawah Ijen Volcano, the largest sulfuric acid crater lake in the world, spews blue lava. It is because it has a pH balance of 0.5 due to sulfuric acid. 2. Hippopotamus milk is pink. It gives the hippopotamuses' sweat a red coloration, commonly believed to be blood (it's not). The acids act as a sunscreen and antimicrobial. The pink coloration is the mixture of these pigmented excretions and the white mammalian milk . 3. Nepal is the only country that doesn’t have a rectangular flag. Flag of Nepal . The national flag of Nepal is the world's only non- quadrilateral national flag . The flag is a simplified combination of two single pennons, the vexillological word for a pennant. Its crimson red is the colour of the rhododendron, the country's national flower. 4. Outer space is only an hours’ drive away