Gjoll

Along the banks of the venomous river Gjoll, the lost souls buried up to their necks are wailing their hymns of sorrow as the bloody ice-waves come crashing in.

Hela[source]

The river Gjoll in Niffleheim marks the boundary between the land of the living and the shores of Nastrond in Hel, the realm of the dead. It is spanned by a bridge called Gjallerbru, which is guarded by Modgud.[1]