Festival fantazie is the largest festival of fantasy and science fiction in the Czech Republic and one of the largest in Central and Eastern Europe. As for number of particular programes it surpasses the longest running science fiction convention Worldcon. In this sense Festival fantazie belongs among the biggest festivals of its kind in the world. In 2007 the festival was visited by 2135 individuals, who stayed for 5 days on average, Festival fantazie Speciál in autumn entertained 640 participants.
Festival is devoted to fantasy and wide spectrum of related subjects. The program includes films literature, games, it is focused on science fiction and future, astronomy, modern technologies, fantasy, horror, mythology, mysteries, military and history. Visitors are offered the opportunity to see films and TV shows, take part in large number of games and contests of all kinds. Furthermore meetings with famous personalities, both vocational and humorous lectures, theatre and fencing performances are organized and much more.