TPATH played "Walls" with basically just Tom on the "Echo" tour and I really do love
how he plays it. Here are the chords of the Walls version from the 99 tour.

"Walls (acoustic)"
Capo on 5th fret

Intro: C Cadd9 (occasionally hammers on) Am F (occasional hammer on C note) G
(occasional hammer on F)

C
Some days are diamonds
Am
Some days are rocks
F
Some doors are open
G
Some roads are blocked

(verse chords same throghuout)

Sundowns are golden
Then fade away
If I never do nothin
Im coming back someday

CHORUS
            F       C
You got a heart so big
            F       C
It could crush this town
             D          Am
And I cant hold out forever
G               C
Even walls fall down



Outro: C Cadd9 C Cadd9 C