1. **The Stone Statues of Easter Island:** These gigantic stone statues, known as moai, are famous icons of Easter Island in Chile. They were carved by the island's ancient inhabitants between 1400 and 1600 AD, and their presence and significance still intrigue archaeologists and historians.

2. **The Treasure of Oak Island:** For over two centuries, Oak Island, located off the east coast of Canada, has been the subject of an ongoing search for supposed buried treasure. Several mysterious artifacts and structures have been found over the years, fueling theories that there may be treasure or significant historical secrets hidden within its depths.

3. **The Dodo Bird in Mauritius:** The dodo, an extinct flightless bird, is an iconic symbol of extinction. It was first found on the island of Mauritius in the Indian Ocean, where it evolved in isolation for millions of years before being discovered by European navigators in the 17th century. Its discovery and subsequent extinction led to renewed interest in the importance of biodiversity conservation.

4. **The Book of Kells on Iona, Scotland:** Although not an isolated island in the strict sense, the Isle of Iona, off the west coast of Scotland, is the origin of the famous Book of Kells, a Christian illuminated manuscript dating back to the 9th century. This book is an extraordinary work of art, known for its colorful and intricate illustrations, and is an important example of Celtic island art.

5. **Komodo Dragons of Indonesia:** The Komodo Islands in Indonesia are home to the world’s largest lizards, known as Komodo dragons. These carnivorous reptiles are unique to the region and represent one of the most fascinating examples of island adaptation. Their discovery and study continue to provide valuable insights into the evolution and ecology of the islands.