posted on Oct, 21 2003 @ 06:44 PM
Well, there alre alot of underground places, like caves that have been hidden for centuries.
The tomb of the First Emperor of China (the one that built the Great Wall and had all those terracotta soldiers built for him) still remains
uncovered. They know that it's there, but they're afraid to open t up, because by experience, they know that if they expose an enviroment that's
been airtight for thousands of years to oxygen all of a sedden, bad things happen. Now the tomb isn't just your ordinary ultra rich ruler's tomb.
Scientists way that there may be something as big as a city down there!