Unknown World

A group of scientists drive an enclosed vehicle into an extinct volcano and then bore more than a thousand miles into the earth. They're searching for underground sanctuaries in case the surface of the earth becomes uninhabitable due to nuclear warfare. This is one of those low-budget, black-and-white films from the 50's that you want to laugh at it, and while it does have its share of bad dialog and cheesy special effects, there's an earnest, committed quality here which eventually overcomes most of the obvious faults. Viewers looking for cheap thrills will be disappointed.