Under eight feet of Antarctic sea ice lies the clearest water on Earth. Plunge through a small hole in the ice to dive with seals, explore ice caves, glide past stalactites of frozen seawater and swim over a rocky black seabed crawling with life. Under a Cracked Sky was narrated and photographed by two research divers at McMurdo Station, one of whom has more experience under the ice than anyone else on the planet.

For more information and tickets to Tribeca: Immersive please visit tribecafilm.com/immersive