The Underground Path in inaccessible in HG/SS.
one underground path goes from celadon to viridian. there is a second path, but it is permanently closed.
It is called the underground railroad=)
No Underground Path is in Vermilion City. There is one north of the city that leads to Cerulean City.
you get this in the underground path
mr bean is not real because other people said the underground path on route 16 but there is no underground path on route 16.
because there is no underground in Kanto
in toronto ---- Montreal's underground city is the largest underground complex in the world.
avoid its path or hide somewhere underground
You cannot go unlock the Underground Path in HG/SS because you don't actually need it, since you can go through Saffron City.
There was a lot of suspicious activity in the underground path. If you've played the original Red or Blue versions, many burglars and suspicious characters hung out underground. The police put an end to that in SoulSilver.
The underground railroad was the path the slaves took from the South to the North to escape slavery. Volunteers housed them along the way.