Heading across the viaduct, Charing Cross side of London Bridge
Station, one can see down to where they appear to have dug up Railway
Approach.

Four parallel arch or tunnel roofs seem to have been revealed just
below the surface.

Is this part of some former station structure, or is there some other
system of vaults below the road? Was this area part of a built-up
embankment, similar to the one on the other side of the river?