When Murphy Kozal builds the Luxurious Rex, people talk so much about the Titanic that she decides to sink it before it launches. They build a Fuller dome on top and install a reactor. Its maiden voyage traces the Puerto Rico Trench.

Naysayers naysaid, Murphy decides to build one that actually floats. But bigger. Much bigger.

“Not just a putting green on deck,” she tells her imarchinects, “a nine-hole course. A theme park. A lagoon.”

“There’s a big lagoon planned,” they assure her.

“How big?”

“How big should it be?”

“Can we fit,” she asks, “another cruise ship in it?”