The US military is running a test for a special type of radio transmitter, to be used to communicate with submarines, in a deep system of underground...
A huge, alien structure resembling an inverted cone, appears in the woods outside a small rural town. Sent from Washington to investigate the origin...
When her archaeologist father disappears on an expedition, Wanda sets out to look for him. What she finds is a secret underground world, where no one...
Deep within Buenos Aires's labyrinthine subway system, a train mysteriously disappears along with its 30 passengers. The subway officials are greatly...
