structural imaging studies of a group of highly trained spatial learners (London taxi drivers) has demonstrated enlargement of specific hippocampal regions corresponding to spatial memory [30],
Nice to see the taxi driver study pop up here.
Maguire EA, Valentine ER, Wilding JM, Kapur N. Routes to remembering: The brains behind superior memory. Nature Neuroscience. 2003;6(1):90–5. pmid:12483214 https://doi.org/10.1038/nn988