Jaw-Dropping Investments: Behold the Top 11 Priciest Construction Endeavors

11.Eljava Air Base

Location: Croatia's Željava Total Expense: $6 Billion* Completed Year: 1968 If you've ever seen a movie featuring actors emerging from a subterranean airport and thought, "That must exist somewhere," you're in luck—it does! One of the largest such facilities is located in Croatia's Željava, nestled within the Plješevica mountain. This impressive underground airport showcases advanced engineering and design, making it a fascinating example of infrastructure hidden from plain sight.
  Eljava Air Base eljava Air Base The Eljava Air Base is one of the largest subterranean air bases in Europe, if not the entire world. As a military facility, much of its activity remains shrouded in secrecy. However, it is known that the airfield was constructed at an impressive cost of approximately $6 billion. The base features a dining hall capable of accommodating 1,000 people, multiple power generators, and an underground water supply, showcasing its extensive infrastructure. One thing you certainly won’t find there is two-day Amazon Prime shipping!

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