Stara Baśń (Old Fairy Tale Castle) in Grybów is a reconstruction of a medieval fortified stronghold, inspired by the history of the Sącz region and the Tatar-Mongol invasions. Behind its stone walls with towers, a drawbridge and galleries, visitors will find the Dragon Tower, the Princess Tower, a banquet hall, a bread oven, the executioner's post and a well which, according to legend, led to underground tunnels and the khan's treasure. We prepared a mobile app for Android and iOS in which visitors are guided by a narrator together with Grynboss the dragon – head of the dragon family and of the castle guard – and young Jacuś. Recordings with sound effects and music lead through over a dozen stops in Polish, English, Ukrainian and German, and versions with audio description make the visit easier for blind and partially sighted people. We launched the first version of the app in 2019 and expanded it with new languages in the following years.