Our paper describes the potential of the mystery and thriller tourism in European cultural destinations and in using this sub-section of dark tourism to get young people keen in unveiling and exploring European cultural heritage. Moreover, it demonstrates the use of in-depth focus groups held with residents and tourists for determining their preferences for mystery and thriller mobile apps involving the dark cultural heritage of the city of Prague.
Our results demonstrate the potential of interactive game-like app and reveal that in order to be successful they should contain a narrative, an interactive, GPS-based map, a virtual tour, a "treasure hunt" game with a possibility to play on-line. Furthermore, as to the mode of payment and the price, our results yield that the potential app should be offered at both App Store and Android Market Play for 2.99 EUR or less.