The Craziest Machine Made In The Past Exists Even Today

We all are pretty much aware of the concept of “Ship within a ship” followed in the late 1800s. It was one of the craziest things ever made to enforce the class system. The kind of service provided to the passengers was according to the amount of money paid by them for travelling in first, second or third class. We have witnessed it in the movies like Titanic.
But what if I tell you that such a ship exists even today. Yeah, it has not been damaged till date. The only question remains is that “What is the purpose of creating such a machine?”

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