What airport was built but never used?

Can you elaborate on the enigmatic tale of the airport that was constructed yet never saw a single plane take off or land? What was the rationale behind its construction? Did it face any hurdles or delays that ultimately led to its abandonment? Were there any environmental or political factors that contributed to this unusual fate? And most importantly, where is this airport located? It's intriguing to ponder the reasons behind such a colossal endeavor gone unused.