|
|
||||||||||||||||||||||||||||||||||||||||||
Comments
| kjfitz @ 2005-07-22 13:15:00 | |
|
They do that to gain altitude over a short distance. There's a neat pair of tunnels near the Canadian Glacir National Park that does two separate 360 degree loops entirely within the mountains on either side of a steep valley. |
|
Post a Comment:
(Policies)
Please log in if you don't want to post anonymously (anonymous users cannot post links) |