Lake Constance graveyard of lost ships

Over fifty shipwrecks dating to ancient times have been catalogued beneath the waters of Germany's Lake Constance.

Underwater archaeologists working in the lake, which borders on Austria and Switzerland, have identified a 14th century sailboat and hope for boats from Roman times and beyond.

"It is only a question of time before an antique ship from Roman times is found," said archaeologist Helmut Schlichtherle.