Hidden Stronghold

Hidden Stronhold is a secret Asgardian fortress hidden within the Asgardian mountains.

Biograpnhy
Heimdall, the former guardian of the Bifrost Bridge, gathered Asgardian citizens after the Goddess of Death, Hela, returned to Asgard and ruled the planet with fear. Searching for the sword so as to conquer all the Nine Realms, Hela and Skurge located the Stronghold as Heimdall and all the Asgardians fled to the Bifrost Bridge. Hela then destroyed the entrance to the fortress, only to discover the place completely vacant.