As promised to many of you users : Here is the 0.2.1 beta from my =SUBWAY= map.

*It's on a normal map, no flat world!
*it's main feature is a VERY extensive subway system. existing of over 13000 blocks of tunnel, 9 stations, 120 smaller exits with a lot of detail and extra's
Feel free to add it to your servers, play it yourself or use it any way you like.

Here is an impression :

First we have "central station" basicly my main house.. many features hidden rooms, and such not shown on pictures.. discover for yourself!

Inside is an elevator that brings you down all the way to bedrock level where the "central hall" is located

=this beta contains 9!! of such central halls.. each NAMED individually.
while those look generally the same (exept for the art on their walls), you can easyly know to know where you are by looking at the many signs on every centrall hall.

You can also travel in 2, 3 or 4 directions from every central hall, to know where you heading simply look above the tunnels entry. :

When traveling trough a tunnel look at the beatifull design...
to give some idea :
*wooden "studs"
"2 tracks, one going out, one going in..
"decorative stones
-number signs, EVERY tunnel is exactly 1000 blocks long.. numbering starts at 0010 of 1010 etc.. and end at 0990, 1990, etc, to give you an idea when in the tunnel how far you are away from a station!

But thats not all! INSIDE the tunnels, at every 100 blocks mark (at 0100, 0200, 0300, etc) is a small "ladder" exit to above.. that can be climed. it will bring you all the way back to fresh air, a nice feature for any server use!

but they also serve a single player use :

While climbing up in the shaft you will see in most shafts 1 or more "doors" on the oppiside side of ladder in the shaft.
Each of those doors leeds to a cave-system.
I connected ALL caves I met while digging the subway system to those doors!
*and while I improved most caves a little (better acces to all corners depths and hights of the caves , can walk around lava lakes.
*I did leave all the minerals and gems intact.. so they are perfect for a little mining!

And when you are above ground,.. and look to find a subway tunnel.. you only will have to look out for a little blue box! (doctor who touch), you can see on the sign on the blue box which 2 stations this tunnel connect and what exit it is..

For example if the blue box sais Station A - Station B, EXIT 0300, that means it is located 300 blocks from A, and 700 from B.

I say one more thing about these exits.. while some stations have only 2 or 3 "official" tunnels.. the 1 or 2 "unconnected" tunnels look like the secret tunnel picture

The "closed for maintenace" hatch can be closed/openen with a lever from the tunnel side only, and it too has an exit tunnel.. BUT, those exit above ground do NOT have the blue box.. they do have an hatch.. but it is hidden.. it can even be under water..

this may not add much for single player, but for server play it is a great extra element.. since one can simply go above ground... to the normal station.. and knowing it will be 100 blocks from the center of that station try to locate it..

The main picture you see is is one of the 8 "normal stations"
every station has a beatyfully decorated lift shaft down to the "central hall"
a nice big glass & iron dome, with inside a small "burger shack" as well as some chest, and very decorative ligning if I may say so..
Outiside you see I reshaped the landscape around the domes.. so you can neatly walk out of them.. into the wild.. as well as neat "subway" signs.

This map has a lot more.. but that you have to discover for yourself.

Why this is still a beta??
*problem with monsters in livingroom in main house, need to fix
*need to recheck all tunnels.. may have left some ceilings open/misplaced some blocks (though those are most likely limited to less than 5 in all tunnels)
*want to build in future a lot more stations and tunneling (extending the whole system)
*want to improve on the stations (give them more functuanallity as "basis" add some villagers to them with "selling booths" for example..
*need to ADD "the end" portals (I started this build in minecraft beta, as such the portals are missing.. (no portal where the eyes of ender point too)
*want to add a couple villages..above ground found to few for my taste
*playing with the thought to add more above ground structures (a church, a castle, and so on) in the landscape.. to explore.. for "bonus items"

But even so.. it still in it's current state is a GREAT play.. give it a try.
-it is currently in creative mode, but it is fairly easy to transfer it to any other mode.

Positive feedback apreaciated, I put a LOT of hours of work in this build.

Additional Notes

Future updates will apear in a couple of months.
next update will contain at least :
*16 new stations
*20 new tunnels of 1000 each
*inproved stations