The classical natural wonders are huge and hard to miss - vast canyons, giant mountains and the like. Many of the most fantastic natural phenomena, however, are also least easy to spot. Some are incredibly rare while others are located in hard-to-reach parts of the planet. From moving rocks to mammatus clouds and red tides to fire rainbows, here are seven of the most spectacular phenomenal wonders of the natural world.
Sometimes the rarest and most mysterious things on our planet also become the most precious, intriguing and exciting. Why do rocks seem to move by themselves in the desert? How can an entire tide turn red or clouds look solid as far as the eye can see? This collection addresses some of the strangest wonders in the world - most of which you have likely never seen.