Grottenbahn is reached by taking the tram from downtown Linz up a pretty steep hill. The trip takes about 20 minutes but is scenic. Upon arrival, it's the last stop, there is great views of Linz and the surrounding area. Walk around the church and there is Grottenbahn. There is an admission charge. Everyone hops on a small tram and starts the trip through Grimm's Fairy Tales. The Grottenbahn is old and campy but a lot of fun for those very reasons.