1) The Great Barrier Reef in Australia is the largest living structure on Earth and can be seen from space.

2) The word "island" contains two vowels: I and A.

3) The word "forest" contains two vowels: O and E.

4) The Epic of Gilgamesh, originating from ancient Mesopotamia, is one of the oldest surviving works of literature and tells the story of the heroic king Gilgamesh and his quest for immortality. It explores themes of friendship, mortality, and the relationship between humans and the divine.