7. Tomb of Qin Shi Huang, China
China’s first emperor was Qin Shi Huang. His burial complex is one of the most elaborate and expansive sites ever discovered. If you have ever heard of China’s Terracotta warriors, this is where there are. But while the site of this tomb is one of China’s most popular tourist destinations, the tomb itself is sealed.
Visitors can view about 2,000 Terracotta warriors, but there are an estimated 6,000 more throughout the underground caverns of the burial complex. Rumor has it that there are strategically placed booby traps that prevent invaders from reaching the burial site. But what we know for sure is that the caverns have a very high concentration of mercury that would kill anyone without proper protective gear. For the foreseeable future, Qin Shi Huang’s myriad treasures will remain safely ensconced with his body.