Escape from Sjór Borg

While trying to prove to their parents they are old enough to go on a voyage to find Sjór Borg, the long-lost Viking city that disappeared into the sea centuries ago, five kids find themselves swallowed by quicksand and dragged into an underground world haunted by various creatures from Norse mythology. Now they have no choice but to prove they are old enough to be explorers. They'll have to draw on their wits, their courage, and each other to escape a maze of tunnels, a volcano, a river ma...