[mwadswor]

Originally Posted by northbay420

actually, technically it hasnt.

but it is theoretically possible to do and several proposals have been put forward.

http://en.wikipedia.org/wiki/Submerged_floating_tunnel

Cool, I guess I watch too many shows on the Discovery/History channel where they show off cool big projects that are only proposed, not actually built yet I thought it had been done in Norway or Denmark. Nevermind then.