Bomb disposal experts were called to disarm the device, believed to be a remnant from WWII, when the island was used as a 'Third Reich' base.
"It was obviously terrifying," said a crew member. "The bomb could have been there for decades untouched but who knows what might have happened if it were disturbed. Nobody was taking any chances."
Cast of the new film also includes Richard Madden, Gemma Chan, Kumail Nanjiani, Lauren Ridloff, Brian Tyree Henry, Lia McHugh, Don Lee and Barry Keoghan.
Written and illustrated by "Captain America" co-creator Jack 'King' Kirby in 1976, Marvel Comics' 19-issue "The Eternals" series,