is stonehenge really's a merry-go-round built by druid carnies. where in the world is carmen san diego? but the most important conspiracy is the end of the mayan calendar, december 21st, 2012, which many experts say predicts the apocalypse. the signs are every where. the economy is cratering. uprisings are spreading across the globe. this is happening. (laughter) spooky stuff. but how exactly will the end times end? this is, mysteries of the ancient unknown. 2012, end of time. america, long may she wave. but how long no when the end times come, the last words you hear just may be -- >> welcome to denver international airport. >> the denver international airport, it may look like a transportation hub but conspiracy experts have long speculated that there's something more sinister going on. >> there's a lot of strange things about this airport. >> secret bunkers filled for a 2012 apocalypse. >> to bring americans in on aircraft, disappear underground, into prisons and execution centers. >> denver airport's runways resemble a nazi swastika. >> many b