In, out, riding or not, just tunnels. Gold Camp Road, Colorado USA. Hampton Roads Bridge Tunnel, Virginia USA.
Somewhere North of Zurich, heading towards the Black Forest in German: Cumberland Gap Tunnel between Tennessee & Kentucky:
Yes, we have tunnels. <object width="640" height="512"> <embed src="https://cdn.smugmug.com/ria/ShizVidz-2011030702.swf" flashvars="s=ZT0xJmk9OTYxNDgyMTM2Jms9VG96TUgmYT0xMjQ0MzgwNF9CQkFFciZ1PWNyYXNobWFzdGVy" type="application/x-shockwave-flash" allowfullscreen="true" width="640" height="512"></object>
Peru, 39 tunnels IIRC. Its the canyon that separates the Cordillera Blanca from the Cordillera Negra. Fantastic place.
right on the border between france and italy. about 450m long, no illumination, holes in natural soil, turns, not the only one on this trail in about 1000 to 2000m height. old italian military road in the alps