Built between 1900 and 1912, were the Railroad Cottages to house the mid-level San Pedro, Los Angeles, and Salt Lake Railroad workers. Representing one of the first housing developments in the U.S., 64 cottages total were constructed in three different styles on four square blocks. Today only 13 of these small, bungalow concrete block houses remain. Four of these cottages have been relocated to the Las Vegas Springs Preserve where they'll be renovated to provide an authentic exhibit of the history they represent. One other building was moved to the Clark County Museum in 2002.