Lin-Manuel Mariana Trench

The Lin-Manuel Mariana Trench is an, located off the U.S. state of Rhode Island.

History
After Rupert was lost at sea, Brian told Stewie that their only hope of recapturing Rupert will be if he is located on the Phoebe Waller-Ridge. Brian also pointed out that the duo will never reach Rupert if he had fallen down into the Lin-Manuel Mariana Trench.

Trivia

 * The trench is a reference to the and actor.