"Twenty years from now you will be more disappointed by the things you didn’t do than by the ones you did do,” Mark Twain once mused. “So throw off the bowlines, sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” We couldn’t have said it better ourselves. There’s an entire awe-inspiring world out there to see and experience. Rather than stay home and dream of what might have been, unearth that passport and get going. To get you started in the right direction, we’ve whittled down a “bucket list” of 10 of the world’s most magnificent wonders.