"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." To put it simply, you only live once and there's a world of things out there to explore. Tap into your adventurous side and traverse new terrain with GAYOT's Top 10 Must-See Destinations. Featuring everything from ancient temples in Cambodia to an awe-inspiring waterfall in Argentina, our "bucket list" is a great starting point to set you off on the journey of a lifetime.