Tuesday, January 23, 2018
You find yourself at one end of a bridge, sure enough. The chamber the bridge crosses is about 80 feet long and about 45 feet wide. The bottom is covered with water, far, far down, about 90 to 120 feet. Once in the chamber, hanging your head over the side, you can hear the water moving, but not rushing.
The ceiling is only ten feet above you - and the stone seems to be cracked, along the length of the bridge. The crack is only a few millimeters to half a centimeter wide, or less than a quarter of an inch; this doesn't let in much light, but it does let in enough to fill the chamber. You can see a shaft of light in the far left corner of the room, from your perspective (sorry, forgot to add this to the map, I'll update it next time), from a hole about three feet wide, in hex 1403.
There are no rails along the bridge and it is only a meter wide, plus, or 3 to 4 feet. The height is dizzying. It isn't a matter of dancing across this thing.
You can hear a faint chittering sound, like a small, rattling mill wheel (that's as close as you can get to a description). It might be coming from anywhere.
You can't tell what it looks like under the bridge; if it is natural or made, as you can't really get into a position to look over the side and under, without risking death.