Strange barren rings in the Namib desert; An island the size of Manhattan disappears without a trace; a lost city in the middle of the Amazonian jungle; a strange image from Area 51.

NASA astronaut Mike Barratt on the International Space Station photographs a strange ring in the ice on Lake Baikal, the world's oldest, deepest, and most mysterious lake; more rings have appeared. Studying a satellite image could hold the key to the location of Sodom and Gomorrah. A vast cloud-like plume travels over New Mexico into Texas.