fantasy land

/F AE1 N T AH0 S IY0 L AE0 N D/
noun
  1. 1

    An ideal place that does not exist in reality.

    โ€œIn the movie Back to School, an economics professor suggests building a factory in a place where no political corruption must be calculated into the costs; the protagonist replies "How about fantasy land?"โ€

Source: https://en.wiktionary.org/wiki/fantasy%20land