Very dissapointing, more like "Journey to the Center of the Very Big
Underground Cave".
After all, a journey to the...ahem... "center" of the Eath would take
weeks
of climbing, or spelunkingl, or whatever, and can't possibly be reached in
a
few hours.
What dangers did they find? A few birds, a dinosaur and some ice-agers.
big
whoop.
This journey to the core was a real bore.