OK! I'll try... When Dharaharaa was built, that time, it was built horizontally first because of fear of heights. When all was completely built, they tried to pull like chariots and tried to make it stand as it is now. But failed after trying many times. When they couldn't do it for long, an expert was consulted. He suggested to make a big hole ( Sundharaa ) so only then it would stand up. Simple theory ! Every dick needs hole to stand up... Thus Dharaharaaa is standing upright now looking at the Sundharaa as a hole.