Question: In what county is the ghost town located where the 1925 movie Air Mail was filmed?

full_context: Document 1: Rhyolite, Nevada: Rhyolite is a ghost town in Nye County, in the U.S. state of Nevada. It is in the Bullfrog Hills, about 120 mi northwest of Las Vegas, near the eastern edge of Death Valley. The town began in early 1905 as one of several mining camps that sprang up after a prospecting discovery in the surrounding hills. During an ensuing gold rush, thousands of gold-seekers, developers, miners and service providers flocked to the Bullfrog Mining District. Many settled in Rhyolite, which lay in a sheltered desert basin near the region's biggest producer, the Montgomery Shoshone Mine.
Document 2: Night Mail: Night Mail is a 1936 documentary film about a London, Midland and Scottish Railway (LMS) mail train from London to Scotland, produced by the GPO Film Unit. The film ends with a "verse commentary" by W. H. Auden, written for existing footage. Benjamin Britten scored the film. The film was directed by Harry Watt and Basil Wright, and narrated by John Grierson and Stuart Legg. The Brazilian filmmaker Alberto Cavalcanti was sound director. The locomotive featured in the film was Royal Scot 6115 "Scots Guardsman", built in 1927. The film has become a classic of its own kind, much imitated by adverts and modern film shorts. "Night Mail" is widely considered a masterpiece of the British Documentary Film Movement.
Document 3: Air Mail Facility: With the establishment of the first air-mail route in 1918, and the later additional routes, plus the accepted use of premium priced air mail by the public, it was only natural that the Railway Mail Service (RMS), being in charge of transit mail, was assigned the task of establishing "Air Mail Field" (AMF) postal facilities at the major airports. Only outgoing air mail was distributed at these workrooms, channeled there by both the post offices and Railway Post Office (RPO) routes. This mail was distributed and dispatched to other AMFs via the different flight connections. Incoming mail from other AMFs was distributed by general scheme and pouched to outgoing RPOs and necessary post offices. The Motor Vehicle Service provided frequent trips between the city post office and the AMF for air mail ground transportation. In 1951, there were 1200 clerks manning forty AMFs. They continue to exist within the U.S. Postal Service (USPS) and are now called Air Mail Centers (AMCs).
Document 4: Itinerant filmmaker: Beginning in the early days of silent films Itinerant filmmakers traveled across the USA to make their movies on location with “home talent.” They capitalized on the public’s desire to see themselves and/or their children in the movies. The filmmakers hoped to cash in on the vanity of politicians, high-society types and prominent businessmen and their families. They would pay a small fee to be in the movie and townspeople would pay to watch their neighbors in the film. It was also common for the Chamber of Commerce to pay the production expenses and choose the backdrop and locations for filming. Many times it was promised that the film would be shown around the country, enticing the viewers to come and visit the places they saw. The film would then be returned to the Chamber after its run. They often filmed the same characters in the same story over and over, only changing the cast in each city. Sometimes the title would change leading people to think their particular film was unique. These itinerant films were popular in the silent era, but in some cases they were still operating into the 1970s. Several people made careers out of making itinerant films.
Document 5: Granite Range (Washoe County): The Granite Range is a mountain range in Washoe County, Nevada west of the town of Gerlach and the lower Black Rock Desert playa.
Document 6: Air Hawks: Air Hawks is a 1935 American aviation-themed science-fiction film based on Ben Pivar's "Air Fury", an unpublished story. Director Albert Rogell who had moved from shorts to B-films, was interested in aviation and had already helmed "The Flying Marine" (1929) and "Air Hostess" (1933). In "Air Hawks", the studio was able to add an A-list star, Ralph Bellamy, as well as exploiting the fame of record-setting pilot Wiley Post in his only feature film appearance.
Document 7: Crystal Springs, Nevada: Crystal Springs is a ghost town in the Pahranagat Valley region of Lincoln County, Nevada in the United States. The ghost town is located at the junction of State Route 318 and State Route 375 (Extraterrestrial Highway), just northwest of U.S. Route 93. It is a popular destination for passersby who want to visit the towns of Hiko and Rachel. The namesake of the ghost town, the Crystal Springs, lies nearby; it is a large group of marshes and springs along the White River. Crystal Springs provides irrigation for multiple nearby ranches and farms, some of which lie over 5 miles away from the springs.
Document 8: Where Was I? (film): Where Was I? is a 1925 silent film comedy directed by William A. Seiter and starring Reginald Denny. It was produced and distributed by Universal Pictures under their Jewel banner.
Document 9: Berlin Historic District (Berlin, Nevada): The Berlin Historic District encompasses the ghost town of Berlin in Nye County, Nevada. The town was established in 1897 as part of the Union Mining District after the opening of the Berlin Mine the previous year. The town never prospered to the same extent as other boom towns like Tonopah and Goldfield, and declined following the Panic of 1907. The town was largely abandoned by 1911. The site was acquired by the state of Nevada as part of Berlin–Ichthyosaur State Park in 1970.
Document 10: The Air Mail: The Air Mail is a 1925 silent film directed by Irvin Willat and starring Warner Baxter, Billie Dove, and Douglas Fairbanks, Jr.. It was produced by Famous Players-Lasky and distributed through Paramount Pictures. Filmed in Death Valley National Park and the ghost town of Rhyolite, Nevada, it was released in the United States on March 16, 1925.
Document 11: Gold Center, Nevada: Gold Center was a mining town in Nye County, Nevada. Located in the Bullfrog Mining District south of Tonapah, Gold Center was established in December 1904 with a United States Post Office being authorized on January 21, 1905. The town began publishing its own newspaper in 1907. The location of the town was ideal as it was on the stagecoach route to Rhyolite and Beatty. It was also near the Amargosa River, allowing sufficient water for drinking and for two mills and an ice house. Gold Center also sold water to Rhyolite and Carrara. The Tonopah and Tidewater Railroad, the Las Vegas & Tonopah Railroad and the Bullfrog Goldfield Railroad all ran through Gold Center. Gold Center also had the first brewery in the area which was built underground to maintain a cool temperature.
Document 12: Secret Service of the Air: Secret Service of the Air (also known as Murder Plane) is a 1939 American adventure film directed by Noel M. Smith and starring Ronald Reagan. This film was the first in Warner Bros.' Secret Service series. The series consisted of four films, all starring Ronald Reagan as Lieutenant "Brass" Bancroft of the U.S. Secret Service and Eddie Foy, Jr. as his sidekick "Gabby." The 1940 film "Murder in the Air" was the last in the series. Reagan was just starting out his film career and commented later that during that period, he was a B movie "Errol Flynn".
Document 13: The Air Legion: The Air Legion is a 1929 aviation silent film about airmail produced and distributed by Film Booking Offices of America(FBO) and was released just as FBO was being turned into RKO Pictures. In Canada, the film was distributed by the Alliance Communications Corporation. Aviation historian Michael Paris considered the film as "virtually the last silent film" on the topic of airmail flying.
Document 14: Beatty, Nevada: Beatty (pronounced BAY-dee) is an unincorporated town along the Amargosa River in Nye County in the U.S. state of Nevada. U.S. Route 95 runs through the town, which lies between Tonopah, about 90 mi to the north, and Las Vegas, about 120 mi to the southeast. State Route 374 connects Beatty to Death Valley National Park, about 8 mi to the west.
Document 15: Rachel, Nevada: Rachel is a census-designated place (CDP) in Lincoln County, Nevada, United States. As of the 2010 census it had a population of 54. As the closest habitation to the Nellis Air Force Range and Area 51, Rachel enjoys a modest celebrity, particularly among aviation enthusiasts and UFO hunters. North of the town is the Quinn Canyon Range, which has the ghost town of Adaven.
ground_truth: Nye County