I was having a nosey at some old photos, and remembered I'd promised an HG bod ages ago that I'd find these photos and post them. It be inside the Tron Kirk, on the High Street.
>This<, in other words. It's not been opened inside for a few years now, as the Council seems to be unsure what to do with the thing. Historical shell for sure, it continues to bravely obstruct the traffic at one end of the South Bridge (built long after it, and the cause for it to be about a third less wide than it was when built in the mid seventeenth century). Abandoned by its congregation in the 1950s, some excuse or other led the powers that be to entirely gut the building; usually the sort of thing that gives historically-minded souls a dose of the vapours, but they accidentally found something rather bloody interesting (well, I think so).
Before the Bridges and other developments punched through it, the High Street was a single street, leading into the Lawnmarket and so on of course, lined on either side by an unbroken series of closes, set about 25 feet apart, as they had been since the founding of the burgh. Being rather wider, the new kirk would cross several of these. Getting to the point, they removed the heads of several closes, but only demolished what they needed to, leaving much undisturbed beneath the floor level of the new construction; when the interior of the kirk was removed in turn, a few centuries later, lo and behold: a preserved section of a cobbled close (actually Marlin's Wynd, or Merlin's Wynd depending on your choice of tha era's flexible spelling), intact up to the first course of stonework, complete with cellars. These were taken in 2006, btw...
Note the supporting pillar resting on a resourcefully improvised foundation:
All the world seems in tune on a Spring afternoon, when we're poisoning pigeons in the park.