You and the gang; Hiccup, Astird, Fishlegs, Ruffnut, Tuffnut, and Snoutlout are flying together, before a portal appeared and all of you went through it. You were all above a place called.. The Crossroads.(Dragon Rising season 1)

Astrid: Where are we?? Hiccup: How did we get here? Ruffnut n' Tuffnut: Whoa! Fishlegs: We're in another world.. Snoutlout: How do we get back?!