Asgard

Asgard was, according to one account, a planet-sized theme park where the Eleventh Doctor and River Song once picnicked on 5 May 5147. (PROSE: Picnic at Asgard) According to another, River Song's visit to Asgard saw her dine with the "old Gods" alongside the Tenth Doctor. This was one of the many times she asked him if he had ever counted the children who were on Gallifrey when he (supposedly) destroyed it, and, as always, he refused to answer. (PROSE: The Day of the Doctor)

Whatever its circumstances, River recorded the adventure in her diary. (TV: The Husbands of River Song, Silence in the Library)

Behind the scenes

 * In Norse mythology, is one of the nine worlds, and the seat of the ruling aesir Gods of the Norse faith.
 * Asgard is also the name of a crater on Callisto, one of the moons of Jupiter.