This is a tunnel under the Oakland Estuary that links the island of Alameda to the Jack London Square area of Oakland. Lots of cars pass through it. Not very long; it takes only a few minutes to pass through. You can walk along the edges, but I con't recommend that because it would be so unpleasant with the car exhaust.

It's one of the links of this suburban island to the main land and the city of Oakland. It is a tunnel, not very long. There is a little walk way, but I don't recommend going for a walk because there is so much traffic and air pollution.

This is a traffic tunnel, an underground road that links Alameda to Oakland. It can get congested. It is not pretty. It is practical and necessary, and old.

We drove through the historic Posey Tube. This time we drove from Alameda to Oakland. The tube is cool to drive through.

We drove through the historic Posey Tube - which links Alameda and Oakland. Its a wonder to see given it was built in 1928.