World Wide Rails
From here, you can view a plethora of live steams of railway cams from around the globe!
Europe:
Sweden: https://www.youtube.com/watch?v=GskBhNPd9Cg
West Sussex, England: https://www.youtube.com/watch?v=gEpcQTf4bFE
Prague, Czech Republic: https://www.youtube.com/watch?v=iWkGwIv20WI
Oustecké nádraží (good luck pronouncing this), Czechoslovakia: https://www.youtube.com/watch?v=0woyfX-Mc3o
Spain: https://www.youtube.com/watch?v=tU9fKuWujes
North America:
Laramie, Wyoming USA: https://www.youtube.com/watch?v=9exmkjk1rjY
Colorado, USA: https://www.youtube.com/watch?v=nUdVtKcprJU
Illinois, USA: https://www.youtube.com/watch?v=_kFZwCBJGgQ
Asia:
Japan: https://www.youtube.com/live/ySvNOURefI8
Taitung, Taiwan: https://www.youtube.com/watch?v=UCG1aXVO8H8
Tokyo, Japan: https://www.youtube.com/watch?v=kmo17mb5LvI