The closed Union station in downtown St. Louis will soon be getting a huge makeover.

The St. Louis Post dispatch reports that a developer is planning on spending $45 million to turn the failed mall into an aquarium.

Officials with ‘Lodging Hospitality Management’, owner of the downtown landmark, say construction will hopefully begin this fall and “will anchor Union Station and establish it as a family attraction”. LHM is discussing the aquarium project with three operators and is near an agreement with one of them.

Depending on final design, the aquarium will house a shark tank that will hold from 350,000 to 550,000 gallons of saltwater and have a 70-80 foot bridge over the top of it.