Polish explorer Krzysztof Starnawski is seen in this underwater photo taken Aug. 15, 2015 in the flooded Hranicka Propast, or Hranice Abyss, in the Czech Republic. He is seen exploring the limestone abyss and preparing for deeper exploration with the use of a remotely-operated underwater robot, or ROV. (Krzysztof Starnawski of EXPEDITION via AP)
{}