Yucatán
From Tardis Wiki, the free Doctor Who reference
Yucatán was a Mexican state. Its capital city was Mérida. According to the Second Doctor, Quintana Roo was another of its cities. (TV: The Enemy of the World)
In 2012, Jo Jones planned to visit Yucatán as part of a conservation tour of the country. (AUDIO: The Infinite Today)