Tomb of Qin Shi Haung, China

You could say that China’s first emperor was one of the most iconic leaders of all time. He’s best known for his Terracotta Army that guarded his tomb since his passing. However, the main tomb of the first emperor remains untouched, and scientists are hesitant to excavate the main tomb out of respect for the ancient burial rites. In addition, there’s also a degree of danger that they’ll dig up soil that’s potentially poisonous and mercury-rich.

One could argue that these hazards are enough to keep this mausoleum shut for eternity. The first emperor of China undoubtedly deserves to rest in peace, and it would be outrageous to excavate. While it may be true that the emperor’s Terracotta army is stunning, it’s probably best to leave these clay figures alone to avoid disturbing an entire culture as well as Mercury poisoning.