Alex Honnold leads an expedition to Greenland to climb a huge 4,000 foot sea cliff and investigate the impacts climate change on the region.

Cast:Alex Honnold, Hazel Findlay, Mikey Schaefer, Aldo Kane, Sanni McCandless,

Genre:Documentary,

country:United Kingdom, United States of America,

Production:Plimsoll Productions, National Geographic,