I always thought the Viking tradition was to build a replica longship, put the corpse aboard, set it afire and shove it off.
One longs for the day when a bunch of Vikings might get together, build a replica of the Queen Mary, and cruise to Bermuda.
Pursuant to what Pontiac wrote, I think there was a fairly recent story about the excavation of Sveyn’s capital in Denmark, could be way off though.
The Viking burials in the pagan era consisted of ship burials, either an actual ship with grave goods and the body (and generally one or more servants, made dead for the occasion), and the outline of the ship laid in basically megalithic slabs, then covered with a burial mound. The Christian Viking kings took to much simpler burials in churches and churchyards.
Here’s the sole documented Viking king pyre:
http://thornews.com/2012/05/12/a-viking-burial-described-by-arab-writer-ahmad-ibn-fadlan/