Tequila Sauza) founded in 1873; El Llano (now Tequila Azteca) founded in 1876; La Mexicana (now Tequila Orendain) founded 1879. In 1873, the "Mezcal wine" (a former name used when referring to Tequila the drink) from the region of Jalisco was officially named "Tequila", in order to distinguish it from Mezcal spirits produced in the south of Mexico, such as those produced in Oaxaca. The name "Tequila" has been protected by the Mexican government since 1974, and its use is limited to products distilled from agave grown in certain regions of Mexico. These regions are in the states of Jalisco, Michoacán, Nayarit, and Guanajuato, and parts of the State of Tamaulipas. The lands in Tamaulipas were added later as the need to cultivate blue agave grew, and these lands and the agave grown on them were certified by the Mexican government for quality. The term is also limited to fifteen production facilities such as Tequila Sauza, Tequila Orendaín, and Jorge Salles Cuervo. Long-established distilleries here produce between 500 and 1000 liters a day but this is not enough to meet the international demand for the product which has skyrocketed since the 1980s. The town and the surrounding areas attract thousands of visitors each year to see the fields, distilleries, Museo Nacional de Tequila (The National Museum of Tequila), the Barraca de Tequila and to ride the Tequila Express, which is a train that runs from Guadalajara to tequila country. The train has 4 cars with a capacity of 68 people and usually requires that tickets be bought a month in advance. World Heritage Site The history and culture behind tequila production has led to the town of Tequila and the vast agave fields surrounding it to be declared a World Heritage Site. It encompasses 35,019 hectares between the foothills of the Tequila Volcano and the valley of the Rio Grande de Santiago, which is covered in fields of blue agave. For over 2,000 years, this plant has been used to make fermented drinks and cloth and since the 16th century has been used to make the distilled liquor with the name of Tequila. Both the drink and the culture associated with making it has become absorbed into Mexican identity. Within these fields are the towns of Tequila, Arenal, Amatitan and Teuchitlán with large tequila production facilities. This site contains an inventory of fields, distilleries and factories (active and inactive) as