The Longest Tunnel in the World Gotthard Base Tunnel with a length of 57 km (35.4 mi) is the longest railroad tunnel in the world and it will be opened in 2017 beneath th…Read More...
Petra: A City Carved In Stone Petra, which means rock, was described as a rose red city that is half as old as time. It was carved more than 2,000 years ago and is now…Read More...
World's largest diamond mine This diamond mine in eastern Siberia (Mirny, to be exact) is so deep that the surrounding "air zone... is closed for helicopters" after "a…Read More...
