Thor and his companions traveled across it on horses on their way to Heimdall and to Jotunheim. On Thor's return to Asgard, he and Loki battled at the entrance to Heimdall's Observatory which resulted in Thor shattering the Rainbow Bridge and destroying the energy output of the Bifrost, preventing Asgard from being able to freely travel within the Nine Realms; this resulted in the outbreak of raids throughout those realms.