SCP-1678 "Unlondon"

SCP-1678 is a full-scale mirror-image reconstruction of the British city of London, located exactly one kilometer underneath the original city of London. Currently, only the #### Park district of SCP-1678 has been explored, but all buildings, at least within the explored district, correlate exactly to their surface counterparts in terms of location, as well as the exterior size and shape, although rarely in terms of architecture, building material, and interior layout.