In Norse Mythology the bridge leading from the realm of the mortals Midgård to the realm of the gods Asgård. The bridge itself is the rainbow and its guardian is the god Heimdall. The bridge is destroyed at the end of the world, Ragnarok. It as built by the Aesir.
... Bahn, the major German railway company
DB is the abbreviation of Dominion Breweries[?], a major beer brewing company of New Zealand.
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