1.TheEiffelToweristhetallestironstructureintheworld.2.MountEverestisthehighestmountainonEarth.3.TheNileRiveristhelongestriverintheworld.4.TheGreatBarrierReefisthelargestcoralreefsystemontheplanet.5.Th
1. The Eiffel Tower is the tallest iron structure in the world.
2. Mount Everest is the highest mountain on Earth.
3. The Nile River is the longest river in the world.
4. The Great Barrier Reef is the largest coral reef system on the planet.
5. The Blue Whale is the largest animal ever known to have existed.
6. The Sahara Desert is the largest hot desert in the world.
7. The Pacific Ocean is the largest ocean on Earth.
8. The Colosseum is the largest amphitheater ever built.
9. The Great Wall of China is the longest human-made structure in the world.
10. The Louvre Museum in Paris is the largest art museum by area.
