El Rancho Vegas was a hotel and casino on the Las Vegas Strip.
 It was located at 2500 Las Vegas Boulevard, at the southwest corner of Las Vegas Boulevard and Sahara Avenue, and opened on April 3, 1941.
 Until 1942, it was the largest hotel in Las Vegas with 110 rooms.
 On June 17, 1960, the hotel was destroyed by fire.
 In 1982, the El Rancho Hotel and Casino formerly known as the Thunderbird and later as the Silverbird opened across the street from the former site of the El Rancho Vegas, creating some confusion.
Old Las Vegas Mormon Fort State Historic Park is a state park of Nevada, USA, containing the Old Mormon Fort, the first structure built by people of European heritage in what would become Las Vegas fifty years later.
 In present-day Las Vegas, the site is at the southeast corner of Las Vegas Boulevard and Washington Avenue, less than one mile north of the downtown area and Fremont Street.
 This is the only U.S. state park located in a city that houses the first building ever built in that city.
 The fort was listed on the National Register of Historic Places on February 1, 1972.
 The site is marked as Nevada Historical Marker #35.
The New Frontier (formerly Last Frontier and The Frontier) was a hotel and casino on the Las Vegas Strip in Paradise, Nevada, US.
 It was the second resort that opened on the Las Vegas Strip and operated continuously from October 30, 1942 until it closed on July 16, 2007.
 The building was demolished on November 13, 2007.
 The land is now owned by Crown Resorts who abandoned their project to build the Alon Las Vegas in May 2017 and put it up for sale.
Robertson High School (RHS) is a public senior high school in Las Vegas, New Mexico.
 The school is part of the Las Vegas City Schools District in former East Las Vegas.
 The building dates from about 1945, when it was known as Las Vegas High School.
 The school was renamed Las Vegas Robertson High School in 1958, after the old Las Vegas High School burned down and a new building was constructed.
 W. J. Robertson had been the Superintendent of the Las Vegas City Schools since 1941 when he suffered a fatal heart attack on November 26, 1956 at the age of 55.
 Mr. Robertson, born in Kansas on November 3, 1901 also served as Principal at Las Vegas High School for many years prior.
 The colors of RHS are red and white, their mascot is the Cardinal.
 The enrollment currently stands at 607.
Air Vegas (IATA: 6V, ICAO: VGA, Call sign: Air Vegas) was an airline with its headquarters on the grounds of the North Las Vegas Air Terminal in North Las Vegas, Nevada.
 It operated daily sightseeing flights from Las Vegas to the Grand Canyon.
 Prior to moving to the North Las Vegas Airport its main bases were McCarran International Airport (LAS), Las Vegas and Henderson Executive Airport (HND), Las Vegas.
The Trump International Hotel Las Vegas is a 64-story luxury hotel, condominium, and timeshare located on Fashion Show Drive near Las Vegas Boulevard, just off the Las Vegas Strip in Paradise, Nevada, named for real estate developer and the 45th and current President of the United States Donald Trump.
 It is located across the street from Wynn Las Vegas, behind Alon Las Vegas on 3.46 acre , near the Fashion Show Mall, and features both non-residential hotel condominiums and residential condominiums.
 The exterior glass is infused with gold.
 The hotel is a member of The Leading Hotels of the World.
The Alon Las Vegas was an upcoming luxury hotel and casino located on the Las Vegas Strip in Paradise, Nevada.
 It was located on the site of the former New Frontier Hotel and Casino, near the Wynn Las Vegas and the Fashion Show Mall.
The Alon A-4 is a prototype American light aircraft of the 1960s.
 Alon INC. of McPherson, Kansas was formed by two former executives of Beechcraft in 1963 and had initially built an improved version of the ERCO Ercoupe as the Alon A-2.
 In 1964, Alon started design of an all-new four-seat light aircraft, the Alon Four (or Alon A-4).
 It was a conventional, singled-engined low-winged monoplane of all-metal construction with a fixed (non retractable) tricycle landing gear undercarriage.
 Alon produced one prototype, this first flying on February 25, 1966.
 The aircraft was never put into full production before the company was sold to Mooney aircraft.
The Las Vegas metropolitan area is home to many sports, most of which take place in the unincorporated communities around Las Vegas rather than in the city itself.
 The Las Vegas Valley has one major league professional team: the Vegas Golden Knights of the National Hockey League (NHL) who began play in 2017 as the region's first major pro team.
 The Oakland Raiders of the National Football League (NFL) will begin play in Las Vegas as the "Las Vegas Raiders" by 2020 and become the region's second major professional team.
 Las Vegas is also home to one minor league sports team: the Las Vegas 51s of the Triple-A Pacific Coast League (Minor League Baseball).
 The 51s are currently the only team to actually play in the city of Las Vegas, playing at the city owned Cashman Field.
 They will be joined in 2018 by the Las Vegas Lights FC of the United Soccer League, one of two leagues that collectively make up the second level of the U.S. men's soccer league system.
Las Vegas Uncork'd (also referred to as Vegas Uncork'd and Vegas Uncorked) is an annual culinary and wine event in Las Vegas, Nevada.
 The concept was developed by the Las Vegas Convention and Visitors Authority, their advertising agency R&R Partners and Las Vegas resort partners who originally considered a number of magazine partners such as Bon Appetit, Food & Wine and Gourmet.
 Bon Appetit was selected as the magazine partner after a review with each magazine.
 The event was launched in 2007 by the Las Vegas Convention and Visitors Authority, "Bon Appétit" magazine led by Editor-in-Chief Barbara Fairchild and co-creator and Executive Director Rob O'Keefe who led the first five years of development of what Eater.com called "the world's most innovative culinary event".
 Las Vegas resort partners over the years include Bellagio, Caesars Palace and Wynn Las Vegas, MGM Grand, Mandalay Bay, The Venetian, Las Vegas and The Palazzo and each year the event features more than 80 celebrated chefs and over 25 events occurring over a spectacular four-day weekend.

Question: A: On which former site was the Alon Las Vegas built on?
Answer: New Frontier Hotel and Casino