Question: What county is the town in Nevada in that has a feature listed with the United States National Register of Historic Places?
Context: Laughlin is an unincorporated town and census-designated place in Clark County, Nevada, United States, and a port located on the Colorado River.  Laughlin is 90 mi south of Las Vegas, located in the far southern tip of Nevada.  It is best known for its gaming, entertainment, and water recreation.  As of the 2010 census, the population was 7,323.  The nearby communities of Bullhead City, Arizona; Needles, California; Fort Mohave, Arizona; and Mohave Valley, Arizona, bring the Laughlin area's total population to about 100,000. Foster Center is a village in the town of Foster, Rhode Island, United States.  It was listed as a census-designated place (CDP) in 2010, with a population of 355.  Historic elements of the village are included in the Foster Center Historic District, which is listed on the National Register of Historic Places.  The district features various colonial and Greek Revival houses as well as the still functioning town building from the late 18th century.  The district was added to the National Register of Historic Places on May 11, 1974. The Bonaparte Historic Riverfront District is a nationally recognized historic district located in Bonaparte, Iowa, United States.  It was listed on the National Register of Historic Places in 1989.  At the time of its nomination it contained 38 resources, which included 24 contributing buildings, one contributing structure, 11 non-contributing buildings, and two non-contributing structures.  Three mill-related buildings near the Des Moines River are associated with the Meek's family who had a central role in the town's development from its founding through the turn of the 20th-century.  They include the woolen mill (1863), the flour mill (1878), which is individually listed on the National Register, and the pants factory (1892).  Eighteen commercial buildings are of brick construction.  Of those, eight are two-story structures, and ten are single-story structures.  The remaining three buildings are wood frame commercial buildings.  The single historic structure is the stone lock in the city park, which is also individually listed on the National Register. The National Register Information System (NRIS) is a database of properties that have been listed on the United States National Register of Historic Places.  The database includes more than 84,000 entries of historic sites that are currently listed on the National Register, that were previously listed and later removed, or that are pending listing.  The database includes approximately 45 pieces of data for each listed property.  Accuracy of the NRIS database may be imperfect.  For example, a 2004 paper addressed accuracy of spatial location data for part of the NRIS content. The Grapevine Canyon Petroglyphs are located in Grapevine Canyon on Spirit Mountain near Laughlin, Nevada, and are listed on the United States National Register of Historic Places.  The area is also known as Christmas Tree Pass.  While the petroglyphs extend through the canyon, a significant concentration lies at the entrance to the canyon which is at an elevation of 2395 ft .  The area features over 700 petroglyphs and many rock shelters. Kitchell Park is a park which is listed on the United States National Register of Historic Places.  The park is in the city of Pana, Illinois, located in Christian County.  A 40 acre facility, Kitchell is one of the city's main parks.  It was added to the National Register of Historic Places in 1992. Tule Springs Ranch and the remaining buildings are listed as a district on the United States National Register of Historic Places in Las Vegas, Nevada.  Part of the area is included in the Tule Springs Archaeological Site and is listed on the U.S. National Register of Historic Places.  The building are part of the Floyd Lamb Park at Tule Springs which is operated by the City of Las Vegas. Loop Retail Historic District is a shopping district within the Chicago Loop community area in Cook County, Illinois, United States.  It is bounded by Lake Street to the north, Congress Parkway to the south, State Street to the west and Wabash Avenue to the east.  The district has the highest density of National Historic Landmark, National Register of Historic Places and Chicago Landmark designated buildings in Chicago.  It hosts several historic buildings including former department store flagship locations Marshall Field and Company Building (now Macy's at State Street), and the Sullivan Center (formerly Carson, Pirie, Scott and Company Building).  It was added to the National Register of Historic Places on November 27, 1998.  It includes 74 contributing buildings and structures, including 13 separately listed Registered Historic Places, and 22 non-contributing buildings.  Other significant buildings in the district include the Joffrey Tower, Chicago Theatre, Palmer House, and Page Brothers Building.  It also hosts DePaul University's College of Commerce, which includes the Kellstadt Graduate School of Business and the Robert Morris College. Ercildoun, population about 100, is an unincorporated community in East Fallowfield Township, Chester County, Pennsylvania, United States.  The hamlet was founded by Quakers and was an early center of the abolitionist movement.  In 1985 the entire hamlet, including 31 properties, was listed as a historic district on the National Register of Historic Places.  Of these properties two were vacant land, 14 were significant buildings, ten were contributing buildings, and five buildings, built in the 1950s, were non-contributing.  The Lukens Pierce House, an octagon house listed separately on the U.S. National Register of Historic Places, is located about half a mile northwest of the hamlet.  Ercildoun is one of about ten hamlets in the township, which has no cities or towns, but has 31 sites listed on the National Register.  It is one of the larger hamlets, located near the center of the township, and historically among the best known.  The city of Coatesville is about 3 miles north. Glyndon, Maryland is an unincorporated community in Baltimore County, Maryland, United States.  Founded in 1871 by Dr. Charles A. Leas, the village is located in the northwest section of Baltimore County and is primarily a residential suburb of metropolitan Baltimore City.  The village is characterized by the predominance of historic Victorian homes and a strong sense of community among its residents.  Glyndon is listed on the National Register of Historic Places (1973) and on the Maryland Inventory of Historic Properties (1973); the Glyndon Historic District was also designated as the first historic district in Baltimore County (1981).  Also listed on the National Register of Historic Places is the Worthington Valley Historic District.
Answer: Clark County