1) The Great Barrier Reef in Australia is the largest coral reef system in the world and is visible from space.

2) In Chinese mythology, the Dragon Boat Festival (also known as Duanwu Festival) is celebrated to honor Qu Yuan, a poet and statesman of ancient China. It involves dragon boat races, eating sticky rice dumplings (zongzi), and performing rituals to ward off evil spirits and protect against diseases.

3) The word "country" contains three vowels: O, U, and Y.

4) Insurance premiums are the payments made by policyholders to insurance companies in exchange for coverage.