 The city was once the self-proclaimed "Helium Capital of the World" for having one of the country's most productive helium fields. The city is also known as "The Yellow Rose of Texas" (as the city takes its name from the Spanish word for yellow), and most recently "Rotor City, USA" for its V-22 Osprey hybrid aircraft assembly plant. Amarillo operates one of the largest meat packing areas in the United States. Pantex, the only nuclear weapons assembly and disassembly facility in the country, is also a major employer. The location of this facility also gave rise to the nickname Bomb City. The attractions Cadillac Ranch and Big Texan Steak Ranch are located adjacent to Interstate 40. U.S. Highway 66 also passed through the city.
