The human brain is without doubt one of the most fascinating works of nature. It is a complex network of about 86 billion neurons. There are ongoing efforts for obtaining both micro scale and macro scale connectomes of the human brain. Braingraphs of about 1000 nodes are already possible to calculate. These graphs describe connections between cortical and subcortical areas.
PIT Bioinformatics Group mapped the macro scale structural connectome of a great number of subjects using the diffusion MRI scans on Human Connectome Project. You can view and download these connectomes from these pages: