The world is full of natural wonders that can leave you speechless. For example, the Great Barrier Reef in Australia is the largest living structure on Earth and is visible from space. The Grand Canyon in the United States is another natural wonder that is over 277 miles long and up to 18 miles wide. Another fascinating natural wonder is the Northern Lights, also known as Aurora Borealis, which is a natural light display in the polar regions caused by the collision of charged particles with atoms in the high-altitude atmosphere.