During the 19th century, the lake continued to dry up, expanding Mexico City east. One of the roads built on this “new” land was Calzada Ignacio Zaragoza, which today leads to the highway to Puebla and Veracruz. Whether covered in lake or not, the territory of the borough became part of the Federal District of Mexico City when it was created in 1824 and has remained since. In the latter part of the century, a number of Mexico's new rail lines terminated at the San Lázaro station, connecting Mexico City with Cuautla and Cuernavaca . The urbanized area extended to what is now the Avenida Congreso de la Unión, with the formation of neighborhoods such as San Lázaro, Santo Tómas, Manzanares, La Soledad, Morelos and Moctezuma. However, much of the land in the 19th century was still swampy with the exception of the far west and the Peñón de los Baños. By 1885, the area was drier but was sparsely populated. A prison was also built in a neighborhood called Lecumberri between 1885 and 1900.