Lake Tahoe divers find diamond ring, possible shipwreck — and 25,000 pounds of trash: "It's shocking to see"

They found no trace of a mythical sea monster, no sign of mobsters in cement shoes or long-lost treasure chests.

But scuba divers who spent a year cleaning up Lake Tahoe's entire 72-mile shoreline have come away with what they hope will prove much more valuable: tons and tons of trash.

In addition to removing 25,000 pounds of underwater litter since last May, divers and volunteers have been meticulously sorting and logging the types and GPS locations of the waste.