Mexico

Mexico is the country immediately south of the United States bordering Texas, Arizona, New Mexico and California. During the sixteenth century Mexico was settled by the Spanish and its citizens are of Spanish and native indigenous Indian descent. Mexico has an area of 770,000 sq mi (2,000,000 km2) and is the 13th largest country in the world. It is the tenth most populous country on the planet and the largest Spanish speaking country. Originally home of the Aztecs and Mayans, Mexico was part of the Spanish empire until 1821. After the Mexican War with the United States, the succeeded part of their territory which now is part of the southern western states. In 2019, the population is about 126,000,000 with its largest overseas population in the United States of almost 13,000,000. 
In “The Good Guy Fluctuation”, after the guys pull a pre-Halloween prank on Sheldon, he mentions that he is from Texas and knows how to settle scores. If they doubt him, they should ask Mexico.
In “The Friendship Contraction”, Sheldon mentions a time when he got on a bus and ended up on a booze cruise to Mexico. 
In “The Bachelor Party Corrosion”, the guys take Leonard on a bachelor party excursion to Mexico and end up with a flat tire. While trying to fix the flat with science, they set the van they had borrowed that had belonged to physicist Richard Feynman.
Category:Reference Materials