This is the nerve-shredding moment that a German adventurer slacklined across one of the highest lakes in the world.<br /><br />Alexander Schulz claims his walk over the volcanic glacier at the summit of Mount Sabalan in north-west Iran is the highest-ever elevated slackline over water.<br /><br />Sabalan stands at 4,811 meters above sea level (MASL), which puts it higher than Mont Blanc, according to local media.<br /><br />Schulz successfully walked 68 metres without falling, alongside three other members of his team. <br /><br />Schulz says he and his team slept in tents in the crater of the volcano during their expedition. <br /><br />"Besides being good for records, it gets more and more clear to me that volcanoes are the coolest places to slackline. I definitely enjoyed those intense two days that we spent at this one," Schulz said.
