Heimdall lives next to Bifrost in a place called Himinbjörg, when he is not busy protecting Bifrost from enemies he is able to ride around on his horse which name is Gulltopp, “Guld top” this is a very special horse and one of a kind because it is made of gold. Heimdall is also known to have wandered among mankind for that reason he has many names associated with with him, and he is also referred to as Rig, Hallinskiði, Gullintanni, and Vindlér or Vindhlér.
Heimdall has a powerful horn
When Heimdall stands guard at the rainbow bridge he has his trustworthy sword at his side “Hofund” to protect him from any unwelcome guests. Should he need any assistance of the other Gods and Goddesses he has a horn named Gjallarhorn “the yelling horn” or “the loud sounding horn”.
This horn is primary for the use at Ragnarök, the end of the world. The sound from the horn is so loud that it can be heard, loud and clear throughout all of the nine worlds in norse mythology. Heimdall will be using this horn at ragnarök when he sees the enemies of Asgard arriving at the plains of Vigrid. When the Gods and Goddesses at Asgard hears the sound from the Gjallarhorn, they will all be warned to get ready for the final battle.