is there a hollow earth?

i'v read that inside deep in earth is a thriving hollow land full of passages and tunnels that connect all over the world... sounds crazy but is it true?

No, it is fictional. The first who really became famous for it was Jules Verne.

Yes.Admiral Bird had a nice trip. Although almost too believable to be true, it's a great story.And also there is much talk about caverns and tubes underneath Giza and the Teotihuacan pyramids. Most of which are secret or hidden away.

No, it's not true.

even though no one has ever been to the center of the earth, scientists can depict to center of the earth by using seismometers and measuring seismic activity. the center is composed of a thin outer crust and layers of molten material varing in temp and density. the solid nickel-composed center is what creates the magnetic field

No, he center of the earth is liquid, kinda makes tunnels impossible.