The Rat Race, Part II
Continuing where we left off...

A transition point, one of many.  I've never taken the time to count how many there are, but this tunnel almost certainly holds the record for the greatest ratio of alternations in architecture for its length, which is actually quite a lot all total.

We opted for this over the K-Mart portrait section.

I don't know what these are called, maybe stalactite ridges?

Here's another view of the same.  They're actually dry, although since the texture formed as a result of water, you get the impression there is still water present on the surface.

One of my favorite formations.  In case you hadn't seen this one in other galleries, that's tar that ran through the middle at some point earlier in its formation.  The minerals won't adhere to it.

A neat little "toothy" part of the formation.

Different lighting.

Up ahead the whole tunnel is a formation.  You can barely even tell these walls are made of brick.

Here's a closer look.  You can see some horizontal lines that hint at the brick beneath all the minerals.

Another brick.  Not in the wall, this is one that was dropped here and then grabbed by the minerals and cemented into place.  Other heavy debris is similarly anchored near here as well.

In other parts, the brick is more evident...

...but it, too, in time will be covered over.

I hadn't noticed these before, but it's a stalagmite.  Once you realize that these form in here as well, you start to see them all over the place.

Another large group of these ridge formations.

This whole pipe was covered with the stuff.

Interestingly, there's nothing on the floor except the soft sediment that is washed out and replaced with every rain storm.  This is why drinking lots of water helps prevent kidney stones.

Another small side tunnel destined to ultimately be choked by mineral deposition.

A different view of the walls.  Water is pouring in through the ceiling here and also ahead in the distance (look for the diagonal stream in the center).  There are only a few spots like this in here, but that's more than in other tunnels.

A look up at a manhole.  Only about seven or eight feet to the surface.  By the end of the tunnel, it's only maybe a foot or two.

Continue to Part III