The park spent three years planning and developing the replacement of the former Fun House attraction, The ride was announced during a media preview event, where its name was revealed to be
Valhalla Regia Anglorum, a
Medieval reenactment organization, participated in the event, with members rowing a Viking vessel to shore and reenacting a small sword battle. As a finale for the ride's opening day, the park put on a fireworks display set to music. In May 2004, a fire which damaged the
Grand National roller coaster and the Alice in Wonderland dark ride was extinguished using some of Valhalla's huge water content. Valhalla was closed towards the end of the 2011 season to undergo its first major refurbishment. The ride reopened on 5 May 2012. On 20 December 2019, Pleasure Beach Resort announced that Valhalla would remain closed for the duration of the 2020 season, the ride's 20th anniversary year. It was originally due to reopen for the 2021 season, but this was delayed due to the
COVID-19 pandemic. The ride reopened on 12 April 2023 for "technical rehearsals". Whilst the ride was open, not all effects were present or operational. The ride’s official grand reopening was on 10 May 2023. The main theme music used for the ride until 2019 was a song called "Song of the Elders", originally composed by Grahame Maclean for the last segment of Rhythmos, the 2000 incarnation of the park's
Hot Ice Show. The new soundtrack, introduced in 2023, was created by The Notable Stranger. == Design ==