I know the folks that live in the more northern climes are used to the underground tunnel thing, as you folks live in places where there is a possibility of getting lost in the snow between buildings. But underground anything is pretty unique down here in Texas. The water table is typically too high to make most anything below the ground work, as standing water always tends to be an issue there. I'd be interested to see what kind of drainage system the tunnels here at UT have in them to keep that from happening. But yeah, so you northerners know, tunnels and even basements are considered a rare novelty here in Texas. Had a friend once that lived in an older house near Dallas, it had a root cellar in it, and no-one ever went down there because there was a good 2 feet of who knows how old standing water down there.
If only there really was a decent and not too legally reprehensible way to get into those really old tunnels under the Tower though. Those babies really piqued my intrerest, particularly the 60-year old artifacts. Guess that's why I'm an Archaeology minor...