Question: In what province is the train Richard Fontaine Maury is best known for?

Context paragraphs:
Tren a las Nubes: The Tren a las Nubes (English: Train to the Clouds ) is a tourist train service in Salta Province, Argentina.  The service runs along the eastern part of the Salta–Antofagasta railway line of the Belgrano Railway (also known as the "C-14" line) that connects the Argentine Northwest with the Chilean border in the Andes mountain range, over 4220 m above mean sea level, the fifth highest railway in the world.  Originally built for economic and social reasons, it is now primarily of interest to tourists as a heritage railway, though cheaper tickets are also available for locals to use the train as transport.

Matthew Fontaine Maury School: The Matthew Fontaine Maury School (also known as Maury School) "(pictured)", in Fredericksburg, Virginia, is an historic school building noted for its Colonial Revival architecture and design as well as its significance in the entertainment and cultural life of Fredericksburg.  The architect of the building was Philip Stern.  Built in 1919-1920, the school was used from then until 1952 for both elementary and high-school students.  After the construction of James Monroe High School, the building was used as an elementary- and middle-school.  The school was closed in 1980.  Maury School was added to the National Register of Historic Places in March 2007.

Joan Fontaine: Joan Fontaine (born Joan de Beauvoir de Havilland; October 22, 1917December 15, 2013) was a British-American actress best known for her starring roles in Hollywood films.  Fontaine appeared in more than 45 feature films in a career that spanned five decades.  She was the younger sister of actress Olivia de Havilland.

François-Jean Bralle: François-Jean Bralle (1750–1832) was a French architect and engineer, best known as for the construction of fountains in Paris during the time of Napoleon Bonaparte.  Bralle was commissioned to build fifteen new fountains in Paris, including the fontaine de Mars, the fontaine du Fellah, and the Fontaine du Palmier in the Place du Châtelet, which are still functioning today.

Trisha Goddard: Patricia Gloria "Trisha" Goddard (born 23 December 1957) is a British television presenter and actress best known for her morning talk shows, "Trisha", which was broadcast on a mid-morning slot on ITV before later being moved to Channel 5.  Goddard has been based in the United States since 2010, when she started working with Maury Povich on his TV series "Maury" as a "conflict resolution expert."  She hosted her own talk show, also named "Trisha", in U.S. first-run syndication from 2012 to 2014.

Matthew Fontaine Maury High School: Matthew Fontaine Maury High School also known as Maury High School, one of five city comprehensive high schools, is a high school located in the Ghent area of Norfolk, Virginia, United States.  Ghent, the community immediately surrounding Maury High School, has experienced a period of renewal which includes upscale single-family and town home construction along with a steady increase of small businesses.

Maury Povich: Maurice Richard "Maury" Povich (born January 17, 1939) is an American television presenter, best known for hosting the tabloid talk show "Maury".

Maury Maverick: Fontaine Maury Maverick (October 23, 1895 – June 7, 1954) was a Democratic member of the United States House of Representatives from Texas, representing the 20th district from January 3, 1935, to January 3, 1939.  He is best remembered for his independence from the party and for coining the term "gobbledygook" for obscure and euphemistic bureaucratic language.

Richard Maury: Richard Fontaine Maury (Philadelphia, 18 December 1882 – Córdoba, 10 July 1950) was an American railway engineer naturalized Argentine, famous for the project of the Argentine "Ramal C-14" of the Ferrocarril General Manuel Belgrano, better known for the touristic "Tren a las Nubes".

Prophet Without Honor: Prophet Without Honor is a 1939 short documentary film directed by Felix E. Feist.  At the 12th Academy Awards, held in 1940, it was nominated for an Academy Award for Best Live Action Short Film, One-Reel.  The documentary is about Matthew Fontaine Maury, a U.S. naval officer who created the first maps that charted the oceans' winds and currents.

Supporting paragraphs: Richard Maury Tren a las Nubes
Answer: Salta Province