At over 2000 kilometers long The Great Barrier Reef is the largest living structure on Earth. The reef is located in the Coral Sea, off...

At over 2000 kilometers long The Great Barrier Reef is the largest living structure on Earth. The reef is located in the Coral Sea, off...

At over 2000 kilometers long The Great Barrier Reef is the largest living structure on Earth. The reef is located in the Coral Sea, off...

At over 2000 kilometers long The Great Barrier Reef is the largest living structure on Earth. The reef is located in the Coral Sea, off...