It can be easier when a landmark or body of water is within a country’s boundaries. In 2015, then-President Barack Obama approved an order from the Department of Interior to rename Mount McKinley — the highest peak in North America — to Denali, a move that Trump has also said he wants to reverse.

President-elect Donald Trump said he wants to change the name of the Gulf of Mexico to the “Gulf of America,” during a wide-ranging press conference on Tuesday. “We’re going to be changing the name of the Gulf of Mexico to the Gulf of America,” he said. “The Gulf of America, what a beautiful name.”