Didn't the Doctor say that the TARDIS interior was potentially infinitely big? If so, then the amount of different architecture styles inside the TARDIS could be enormous, IMO.
There's probably some parts of the TARDIS interior that may be made completely out of straw, who knows?
In my world, where I am God...(Because I possess the Key to Time...I can do anything!), there would be a scene in a TARDIS bottle show in which the Doctor & his companion cross a bridge deep in the TARDIS (sorta like the one they crossed on their way to the Great Machine on Epsilon 9 in B5), that goes like this...
While crossing bridge...
Amy: Doctor, just how big is the TARDIS?
Doctor: There are no measurements in infinity?
Amy: That didn't answer my question.
Doctor: Okay, well, watch this....
The Doctor takes the sonic...smiles, drops it over the edge of the abyss.
Amy: What'd you do that for?
Doctor: Sssh...counts...4-3-2-1-puts his hand out...
The sonic drops into his hand from above.