Chaco Canyon, New Mexico

More than thousands years ago, Chaco Canyon was an empty desert and bustling center of a massive ancient world. A group of Native American people, known as the Ancestral Puebloans, turned this harsh valley into a thriving city filled with massive buildings, busy trade roads, and deep mysteries.  they were skillful  builders. Without using horses, wheels, or metal tools, they carried thousands of heavy pine logs from mountains over fifty miles away. They were in process to used these logs and millions of cut stones to build what we call "Great Houses." These were not just regular homes; they were giant apartment-like complexes. The biggest one was Pueblo Bonito, that actually rose five stories high and had over six hundred rooms! Until the late 1800s, these were the largest buildings ever constructed in North America. See More: 

Valley of Planets, Libya

Valley of planets is most strange place on earth. Its looks like alien deliberately place mysterious stones put at the planet. Valley of the Planets remains a beautiful, untouched riddle locked away by the Sahara. Over eons, fierce desert winds whipped sand across the landscape, slowly shaving away the softer layers of rock and leaving these hard, round cores behind. Also See