Submarine Tourism Is—for Now—a Booming Business Shannon PalusSubmarine Tourism Is—for Now—a Booming Business Shannon Palus It's not all trips to the Titanic ($250,000!) or the Mariana Trench (you don't want to know.)  

It’s not all trips to the Titanic ($250,000!) or the Mariana Trench (you don’t want to know.)

 

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