Answer:
I think the answer is in a "parque de atracciones" (amusement park).
Step-by-step explanation:
I think the answer is in a "parque de atracciones" (amusement park). You could also say "parque temático" (theme park). I don't think that an ordinary "feria" (fair) has "montaña rusa" (roller coaster).
Native speaker over here.