WARSAW, Poland (AP) — A team of explorers say they have revealed an underwater cave to be the world's deepest, at 404 meters (1,325 feet) down, near the eastern Czech town of Hranice. Polish explorer Krzysztof Starnawski, who led the team, told The Associated Press Friday he felt like a "Columbus of the 21th century" to have made the discovery. Starnawski, 48, determined Tuesday that the flooded limestone Hranicka Propast, or Hranice Abyss, which divers have explored for decades, was at least 404 meters deep.Read more on NewsOK.com