| Semmeringbahn | 
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| Semmering railway with surrounding mountain scenery
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| Owner | Austrian Federal Railways | 
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| Operator(s) | Austrian Federal Railways | 
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| Line length | 41 km (25.5 mi) | 
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| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge | 
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| Minimum radius | 190 m (623 ft) | 
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| Electrification | 15 kV, 16+2⁄3 Hz Overhead line | 
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| Maximum incline | 2.5 % | 
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| Criteria | Cultural: ii, iv | 
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| Reference | 785 | 
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| Inscription | 1998 (22nd Session) | 
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| Area | 156.18 ha | 
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| Buffer zone | 8,581.21 ha | 
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Show route diagram
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 | 74.902 | Gloggnitz | 439 M |   
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 | 77.694 | Schlöglmühl | 458 M |   
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 | 81.961 | Payerbach-Reichenau | 493 M |   
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 |  | Schwarzatal viaduct |  |   
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 |  | Payerbachgraben viaduct |  |   
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 | 84.798 | Küb | 543 M |   
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 |  | Kübgraben viaduct |  |   
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 | 85.773 | Pettenbach tunnel | 185.25 m |   
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 |  | Höllgraben viaduct |  |   
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 | 86.663 | Steinbauer tunnel | 87.66 m |   
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 |  | Abfaltersbachgraben viaduct |  |   
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 | 88.222 | Eichberg | 609 M |   
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 | 89.185 | Eichberg tunnel | 88.80 m |   
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 | 89.400 | Geyregger tunnel | 80.95 m |   
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 | 91.027 | Rumpler tunnel | 52.36 m |   
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 | 92.284 | Klamm-Schottwien | 699 M |   
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 | 92.400 |  |   
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 | 92.779 | Klamm tunnel | 190.83 m |   
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 |  | Wagnergraben viaduct |  |   
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 |  | Gamperlgraben viaduct |  |   
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 | 94.499 | Gamperl tunnel | 78.2 m |   
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 |  | Rumplergraben viaduct |  |   
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 | 95.906 |  | Weinzettelwand tunnel |  | 3 tunnels & 2 galeries | 
 | 688 m |   
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 | 96.696 | Weinzettelfeld tunnel | 238.96 m |   
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 | 97.574 | Breitenstein | 791 M |   
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 | 98.125 | Kleiner Krausel tunnel | 13.82 m |   
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 |  | Krausel-Klause viaduct |  |   
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 | 98.332 | Polleros tunnel | 337 m |   
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 |  | Kalte-Rinne viaduct |  |   
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 |  | Adlitzgraben viaduct |  |   
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 | 100.715 | Weberkogel tunnel | 406.91 m |   
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 | 101.577 | Wolfsberg tunnel | 439.53 m |   
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 | 102.098 | Wolfsbergkogel | 883 M |   
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 |  | Kartnerkogel viaduct |  |   
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 | 102.391 | Kartnerkogel tunnel | 201.16 m |   
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 | 103.412 | Semmering | 896 M |   
|  |  |  |  | Old Semmering Tunnel | 1,434 m |   
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 |  |  | 898 m |   
|  |  |  |  | New Semmering Tunnel | 1,512 m |   
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 |  | Steinhaus viaduct |  |   
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 | 107.685 | Steinhaus | 838 M |   
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 |  | Holzergraben viaduct |  |   
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 |  | Viaduct near Jauern |  |   
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 | 110.486 | Spital am Semmering | 789 M |   
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 |  | Fröschnitzbach viaduct |  |   
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 | 116.727 | Mürzzuschlag | 681 M |   
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| H: = height of viaducts |  
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The Semmering railway (German: Semmeringbahn) in Austria, which starts at Gloggnitz and leads over the Semmering to Mürzzuschlag, was the first mountain railway in Europe built with a standard gauge track. It is commonly referred to as the world's first true mountain railway, given the very difficult terrain and the considerable altitude difference that was mastered during its construction. It is still fully functional as a part of the Southern Railway which is operated by the Austrian Federal Railways.