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The Rhaetian Railway actually considered a 5 km underground tunnel to end all street running in Chur, but the high cost of construction and the fact it really wouldn't save that much on time ended the idea.
![★ 4K 🇨🇭Chur - Arosa cab ride, Switzerland [02.2021]](http://i.ytimg.com/vi/u70shHkbmWI/mqdefault.jpg)
The Rhaetian Railway actually considered a 5 km underground tunnel to end all street running in Chur, but the high cost of construction and the fact it really wouldn't save that much on time ended the idea.