Bernina line is the only line which crosses Alps without summit tunnel, but with inclines to 70 o/oo. Train leaves Alp Grüm near the top point of this line
<a href="https://cs.wikipedia.org/wiki/User:PetrS." class="extiw" title="cs:User:PetrS.">cs:User:PetrS.</a> (2003 Petr Sporer)
CC BY-SA 3.0
<a href="https://cs.wikipedia.org/wiki/Soubor:Alp_grum.jpg" class="extiw" title="cs:Soubor:Alp grum.jpg">cs:Soubor:Alp grum.jpg</a>