this is from another site, thought id submit it here too

Fortress
by Pinback
Transcribed By Eddie Phanichkul (eddie@whackedinternet.com)

Tuning: Drop D (DADGBe)

[Main Riff]
e|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
G|-----------------------------------------------------------------|
D|-----------------------------------------------------------------|
A|------5-------5-------5-------5-------3-------3-------3----------|
D|--0-------0-------0-------0-------7-------7-------7-------7---5--|

(Second Guitar)
e|--------------7---5-----------------------7---5-55---------------|
B|----------------------8---5--------------------------8---5-------|
G|--7---5---------------------7-7---5-------------------------7----|
D|----------7---------------------------7--------------------------|
A|-----------------------------------------------------------------|
D|-----------------------------------------------------------------|


[Chorus]

Stop, it's too late...
e|-----------------------------------------------------------------|
B|-----------------------------------------------------------------|
G|--7-------5---7----5---5---7-7-----------------------------------|
D|------7----------7---7---7--------5---5---5--7-----3---3---------|
A|--------------------------------8---8---8--------5---5---5--3--5-|
D|-----------------------------------------------------------------|

These also might be the chords during the chorus:
D, A, F, G