Question: American Casino & Entertainment Properties, owns which Las Vegas facility?
Context: MGM Resorts International is a global hospitality and entertainment company operating destination resorts in Las Vegas, Mississippi, New Jersey and Detroit, including Bellagio, MGM Grand, Mandalay Bay and The Mirage.  The company recently opened MGM National Harbor in Maryland and is developing MGM Springfield in Massachusetts.  It has a majority interest in MGM China Holdings Limited, which owns the MGM Macau resort and casino and is developing a gaming resort in Cotai.  MGM Resorts owns 50 percent of CityCenter in Las Vegas, which features ARIA Resort & Casino.  It has a majority controlling interest in MGM Growth Properties, a real estate investment trust. William Norman Pennington (March 24, 1923 – May 15, 2011) was an American casino industry executive.  A pioneer in Nevada’s casino industry, he played a major role in establishing the Circus Circus company, including Excalibur Hotel Casino, Luxor and Mandalay Bay.  He owned several properties in Las Vegas, Reno, Hawaii and elsewhere.  For many years he was listed on the Forbes 400. The Stratosphere Las Vegas (formerly Vegas World) is a hotel, casino, and tower located on Las Vegas Boulevard just north of the Las Vegas Strip in Las Vegas, Nevada, United States. Aquarius Casino Resort (formerly Flamingo Hilton Laughlin and Flamingo Laughlin) is a hotel and casino located on the banks of the Colorado River in Laughlin, Nevada.  It is owned and operated by American Casino & Entertainment Properties and is the largest hotel in Laughlin. The Tropicana – Las Vegas Boulevard intersection on the Las Vegas Strip (Tropicana Avenue and Las Vegas Boulevard), is noteworthy for several reasons.  It was the first intersection in Las Vegas completely closed to street level pedestrian traffic and its four corners are home to four major resorts: Excalibur Hotel and Casino, Tropicana Las Vegas, New York-New York Hotel and Casino and MGM Grand Las Vegas—the latter has 5,044 rooms and was once the largest hotel in the world.  The resorts at the four corners have a total of 12,536 hotel rooms as of 2016. Station Casinos is a gaming company based in the Las Vegas suburb of Summerlin, Nevada, founded by Frank Fertitta, Jr. Station Casinos, along with Affinity Gaming, Boyd Gaming, and American Casino & Entertainment Properties, dominate the locals casino market in Las Vegas.  The company purchased several sites that were gaming-entitled, meaning that major casinos can be built at that location without additional approvals.  There are only a limited number of such sites available in the Las Vegas area.  Station has also branched out into managing casinos that they do not own.  Red Rock Resorts, Inc. () is a publicly traded holding company that owns a portion of Station Casinos. American Casino & Entertainment Properties (ACEP) is a casino holding company headquartered at the Stratosphere Las Vegas.  ACEP was a wholly owned subsidiary of American Real Estate Partners before it was sold to Whitehall Street Real Estate Funds, an investment arm of Goldman Sachs, in February 2008.  The company owns the following 4 casinos: Aquarius Casino Resort, Arizona Charlie's Decatur, Arizona Charlie's Boulder, and Stratosphere Las Vegas. Holy Cow!  Casino and Brewery (formerly Foxy's Firehouse) was a locals casino and microbrewery on South Las Vegas Boulevard, north of the Las Vegas Strip, in Las Vegas, Nevada.  The property began in 1955 as Foxy's Deli, which operated until its closure in 1975.  A year later, the building was reopened as a casino named Foxy's Firehouse, which later closed in 1988.  Tom "Big Dog" Wiesner purchased the building and reopened it as the Holy Cow casino in 1992.  Wiesner added a microbrewery the following year, making the Holy Cow the first brewery to open in Las Vegas.  Wiesner persuaded the state to change its laws that had prohibited breweries from operating in Las Vegas. Corey Sanders has served as Chief Operating Officer of MGM Resorts International since June 2010.  He oversees operations at the Company’s wholly owned properties, which in Nevada include Bellagio (resort), MGM Grand Las Vegas, Mandalay Bay, The Mirage, New York-New York Hotel and Casino, Monte Carlo Resort and Casino, Luxor Las Vegas, Excalibur Hotel and Casino, Circus Circus Las Vegas, Circus Circus Reno, Gold Strike Jean and Railroad Pass Casino.  He also oversees Beau Rivage (Mississippi) in Biloxi and Gold Strike Tunica, both in Mississippi, as well as MGM Grand Detroit. Arizona Charlie's Boulder is a 301-room hotel and a 35000 sqft locals casino located in the Paradise, Nevada, United States.  Owned by American Casino & Entertainment Properties, it is on Boulder Highway between the Boulder Station and the Sam's Town.
Answer: Stratosphere Las Vegas