Sorry, it's not possible for many reasons...
There may be large geodes within the Earth, but that's about it...
Think about it; the Earth and other planets were formed violently. Upon the creation of our solar system the Earth was completely molten. The heavier elements sank to the center of the Earth to form our core. The rotation of our core gives us our magnetic field...
If the Earth were hollow then a cosmic collision would simply punch a hole in the Earth. That doesn't happen...
However, you could compare the Earth to a very large electric generator/DC motor...
400 years ago they would have chopped your head off for saying that.
In fact, in Galeleo made a kick ass telescope and he was like "Hey you guys look at this.. The moons of Jupiter are not orbiting us, they are circling around Jupiter!"
The catholic pope was all like "Cool story, bro, but tell everyone you are a liar and possessed by the devil or we will torture you to death." Like a boss Galileo said "Fuck you, i'm looking at it move right now but fine whatever, I take it back." So the catholic church sentenced him to life in prison.
Wikipedia has the detailed version:
"Galileo was found "vehemently suspect of heresy", namely of having held the opinions that the Sun lies motionless at the centre of the universe, that the Earth is not at its centre and moves, and that one may hold and defend an opinion as probable after it has been declared contrary to Holy Scripture. He was required to "abjure, curse and detest" those opinions.
He was sentenced to formal imprisonment at the pleasure of the Inquisition. On the following day this was commuted to house arrest, which he remained under for the rest of his life." -http://en.wikipedia.org/wiki/Galileo_Galilei