You might find it interesting to read up a bit on blindsight and the neural plasticity of the congenitally blind.

E.g. fMRI experiments on some such people show rich activation of the visual cortex when the blind person is going about and space and hearing and feeling things. This could just mean that region has been recruited to do non-visual processing, but it could also be that the visual cortex is producing strange and unimaginable images in their mind's eye in response to sounds and feelings, such that they are really literally "seeing" sound and such.