
Union Pacific Railroad diesel locomotive no. 3150 hauls westbound freight at Hermosa, Wyoming, on September 27, 1981. Photograph by Katherine Botkin. © 1981, Katherine Botkin.

Denver and Rio Grande Western Railroad diesel locomotive no. 5771 leads passenger train no. 17, the "Rio Grande Zephyr" at Plainview, Colorado, February 19, 1983. Photograph by Katherine Botkin. © 1983, Katherine Botkin

DRGW freight train led by diesel locomotive no. 5333 at Floy, Utah, on March 31, 1983. Photograph by Katherine Botkin. © 1983, Katherine Botkin.

Denver and Rio Grande Western Railroad diesel locomotive no. 3102 hauls westbound freight at Floy, Utah, on April 2, 1983. Photograph by Katherine Botkin. © 1983, Katherine Botkin.

Denver and Rio Grande Western passenger train no. 17, the "Rio Grande Zephy,r" at Floy, Utah, on April 2, 1983. Photograph by Kate Botkin. © 1983, Kate Botkin.

Southern Pacific Railroad steam locomotive no. 4449 leads eastbound passenger train, the "Daylight Limited," north of Dorris, California, on May 6, 1984. Photograph by Katherine Botkin. © 1984, Katherine Botkin.

South African Railways 25NC-class steam locomotive leads a westbound freight train at Bethlehem, Orange Free State (present-day Free State), South Africa, on July 12, 1984. Photograph by Katherine Botkin. © 1984, Katherine Botkin.

South African Railways 25NC-class steam locomotive leads eastbound passenger train east of Barnea, a railroad siding located in Orange Free State (present-day Free State), South Africa, on July 13, 1984. Photograph by Katherine Botkin. © 1984, Katherine Botkin.

South African Railways 25NC-class steam locomotive no. 3408 leads passenger train north of Owanty Station in Setsoto, Orange Free State (present-day Free State), South Africa, on May 27, 1985. Photograph by Katherine Botkin. © 1985, Katherine Botkin.

South African Railways 25NC-class steam locomotive no. 3419 leads a southbound passenger train at location know as Generaalsnec in South Africa, on May 30, 1985. Photograph by Katherine Botkin. © 1985, Katherine Botkin.

South African Railway 19D-class steam locomotive in Grahamstown, Cape Province (present-day Eastern Cape), South Africa, on June 7, 1985. Photograph by Katherine Botkin. © 1985, Katherine Botkin.

Eastbound South African Railways 25NC-class steam locomotive at Sekonyela, a railroad siding in Orange Free State (present-day Free State), South Africa, on July 12, 1984. Photograph by Katherine Botkin. © 1984, Katherine Botkin.

Three Denver and Rio Grande Western Railroad diesel locomotives, led by no. 3086, haul freight train over Tennessee Pass at Pando, Colorado, on September 22, 1986. Photograph by Katherine Botkin, © 1986, Katherine Botkin.

A Chinese National Railways QJ-class steam locomotive pushes southbound timber at Nancha, Heilongjiang, China, on April 7, 1988. Photograph by Katherine Botkin. © 1988, Katherine Botkin.

Chinese National Railway QJ-class steam locomotive no. 6794 leads westbound freight train in Dailing, Heilongjiang, China, on April 9, 1988. Photograph by Kate Botkin. © 1988, Kate Botkin

Chinese National Railway QJ-class steam locomotive no. 711 leads eastbound passenger train over the Yellow River at Qingbaishi, Gansu, China, on April 14, 1988. Photograph by Katherine Botkin. © 1988, Katherine Botkin.

National Railways of Zimbabwe 15th-class Garratt steam locomotive no. 410 leads northbound freight train at Deka, Hwange District, Matabeleland North, Zimbabwe, on July 11, 1990. Photograph by Katherine Botkin. © 1990, Katherine Botkin.

Westbound Union Pacific Railroad freight train at Dale Junction, Wyoming, on October 19, 1991. Photograph by Katherine Botkin. © 1991, Katherine Botkin.

National Railways of Zimbabwe 15th-class Garratt steam locomotive hauls southbound freight north of Wankie (present-day Hwange) in Matabel Zimbabwe, on July 4, 1992. Photograph by Katherine Botkin. © 1992, Katherine Botkin.

South African Railways 19C-class locomotive no. 2439 leads westbound passenger train at Franshoek, Orange Free State (present-day Free State), South Africa on May 24, 1993. Photograph by Katherine Botkin. © 1993, Katherine Botkin.

South African Railways class 19C steam locomotive nos. 1882 and 2439 lead a passenger train near Mission, Transvaal (present-day Limpopo), South Africa, May 26, 1993. Photograph by Katherine Botkin. © 1993, Katherine Botkin.

Atchison, Topeka, and Sante Fe Railroad diesel locomotive no. 5071 leads freight train through Crozier Canyon in Arizona on November 4, 1994. Photograph by Kahterine Botkin. © 1994, Katherine Botkin

South African Railways 24-class steam locomotive nos. 3603 and 3684 lead northbound passenger train at Barandas, Cape Province (present-day Western Cape), South Africa, on July 24, 1995. Photograph of Katherine Botkin. © 1995, Katherine Botkin.

Ferrocarriles Argentinos (Argentine Railways) steam locomotive no. 16 leads passenger train north of El Maitén, Chubut, Argentina, on March 28, 1996. Photograph by Katherine Botkin. © 1996, Katherine Botkin

Căile Ferate Român steam locomotive no. 230299 leads northbound mixed train in unidentified location in Romania on October 2, 1996. Photograph by Katherine Botkin. © 1996, Katherine Botkin

Укрзалізниця (Ukrainian Railways) SZD steam locomotive nos. 251-86 and 218-31 lead a northbound passenger train in Ukraine on October 6, 1996. Photograph by Katherine Botkin. © 1996, Katherine Botkin.

Conductor of a Jordan Railway international train at Deraa, Syria, on July 26, 1998. Photograph by Katherine Botkin. © 1998, Katherine Botkin

A Chemins de fer syriens (General Establishment of Syrian Railways) steam locomotive leads a passenger at Khabab, Deraa, Syria, on July 31, 1998. Photograph by Katherine Botkin. © 1998, Katherine Botkin.

Jitong Railway QJ-class locomotives lead eastbound freight over Simingyi Viaduct, west of Hadashan, Inner Mongolia, China, on November 14, 2002. Photograph by Katherine Botkin. © 2002, Katherine Botkin

Guayaquil & Quito steam locomotive no. 53 leads southbound mixed train south of Tambo Siberia, Azyay, Ecuador, on August 22, 2003. Photograph by Katherine Botkin. © 1983, Katherine Botkin

Jitong Railway QJ-class steam locomotive nos. 7009 and 6884 westbound at Sandi Station in Inner Mongolia, China, on November 23, 2003. Photograph by Katherine Botkin. © 2003, Katherine Botkin

Two QJ-class Jitong Railway steam locomotives haul eastbound freight west of Hadashan, Inner Mongolia, China, on November 23, 2003. Photograph by Katherine Botkin. © 2003, Katherine Botkin.

Jitong Railway QJ-class steam locomotive no. 7164 hauls westbound freight east of Shangdian, Inner Mongolia, China, on December 9, 2004. Photograph by Katherine Botkin. © 2004, Katherine Botkin.

Jitong Railway QJ-class steam locomotive nos. 7040 and 6828 haul freight over viaduct west of Hadashan, Inner Mongolia, China, on December 9, 2004. Photograph by Katherine Botkin. © 2004, Katherine Botkin.

Jitong Railway QJ-class steam locomotives nos. 7038 and 7007 lead freight train west of Pingdingmiao, Inner Mongolia, China, on December 16, 2004. Photograph by Katherine Botkin. © 2004, Katherine Botkin.

Denver and Rio Grande Western Railroad K-28 steam locomotive no. 478 westbound at Needleton, Colorado on February 11, 2007. Photograph by Katherine Botkin. © 2007, Katherine Botkin.

British Railways steam locomotive no. 760001 leads eastbound passenger train at Loch Eilt in the West Highlands of Scotland on October 12, 2008. Photograph by Katherine Botkin. © 2008, Katherine Botkin

Denver and Rio Grande Western Railroad steam locomotive no. 489 hauls eastbound coal empties between Los Pinos and Osier, Colorado, on October 5, 2016. Photograph by Katherine Botkin. © 2005, Katherine Botkin.