"2 August 2015 Arthur Robert Obst exploring the lava cracks and caves near Lake Pingvallavatn within Pingvellir National Park of western Iceland - Major adventure travel Robert Obst Retirement Program or Adventure Travel Obst Family on Ice or Obst Adventures with Kids within and around and across Iceland 2015 (Iceland Reykjavik Pingvellir; Obst Photos 2015 Nikon D810 Adventure Travel Obst Iceland Image 0216)" NOTE: "The 'Capture Date" of ALL images within my 'Obst Family on Ice 2015' collection is OFF by one day before the actual date, so to determine the correct 'Capture Date' one must ADD ONE day to the 'Capture Date" as recorded by my Nikon D810 camera."