Treasure of the Petrified Forest (original title: Il tesoro della foresta pietrificata) is a 1965 Italian adventure film directed by Emimmo Salvi [de; it].

It mixes elements of the Nibelungen saga and of Richard Wagner's opera Ring of the Nibelung, which is also used as soundtrack (especially the famous Ride of the Valkyries).

The god Wotan gives the young Prince Sigmund of Valhalla and his sister Brunhilde, the leader of the Valkyries, the task of defend the Petrified Forest.

This is threatened by the Vikings, led by the aggressive Hunding, who plans an invasion of the forest, in search of the secret treasure of the Nibelung [de], the possession of which prospects unlimited power.

After crossing the border and invading Valhalla, Hunding finds an ally in the daughter of one of Sigmund's loyal followers, Erika, who is embittered by unrequited love.