One really interesting example of this is that of humans who perform echo location. Parts of the brain normally reserved for sight are activated, to some degree

One really interesting example of this is that of humans who perform echo location. Parts of the brain normally reserved for sight are activated, to some degree, by regions of the brain responsible for vision. Basically, they're not just 'hearing' in the traditional sense, though that happens as well; they're also 'seeing' the sound that bounces back. Kind of crazy