16 Natural Wonders That Show How Unique Earth Is

You don’t have to hike the world-famous Grand Canyon in Arizona, but yours truly can assure you it’s a memorable accomplishment.  Discovered by some Spanish conquistadors, this natural canyon is  277 miles long and up to 6,000 feet deep.  It is perhaps best characterized by its striking scarlet stone walls.  

Here you can enjoy guided tours, horseback riding, rafting, and even helicopter tours.  According to online sources, six million tourists trek here every year.  Travel here in the fall or spring if you wish to avoid the crowds.