Deep within the Earth's crust or shell exists the most fantastic realm imaginable, where reality begins to merge with fantasy. Here, in the vast caverns and tunnels lie hidden from view the strangest creatures and civilizations, long thought to be extinct and preserved in memory in the form of myths and fables. Atlanteans and Lemurians, sorcerers and demi-gods, reptoids and serpent people, elves and giants, fairies and daemons, dinosaurs and wooly mammoths, giant tortoises and sabertooths, insects the size of people, plants the size of houses, mushrooms the size of trees, trees the size of mountains, grapes the size of melons, and precious stones the size of boulders. These and more wonders are to be found in the magical and sometimes forbidden stratas hundreds of miles beneath our very feet.