I know nothing about the structure or the location pictured above, except that it apparently is somewhere in Armenia. It appears to be a collection of brick or stone buildings built on a rock outcrop above a deep valley. The outer walls of the outer buildings are almost flush with the rock wall in the style of ancient castles; at the far left of the picture is a larger opening that looks like a portico for a drawbridge. The outer wall-buildings have perhaps arrow-slits (balistraria), or perhaps just skinny windows.
Behind that a large building with certainly a cross on the top, and the building itself perhaps with a cross-shaped floor plan.
A fortified monastery? I don't know, but would love to find out more. The photo album at the original site has all text in what looks like Cyrillic alphabet, so I can't even begin to probe it (babelfish only yielded "multifaceted Armenia." In the past year TYWKIWDBI has had only one visitor from Armenia (from Yerevan), but perhaps someone else knows of this place or can find some information. Thanks in advance. Looks like an absolutely fascinating place that could probably tell some hair-raising stories if the walls could speak...
Original image credit here, via Uncertain Times.
Addendum: Further information and photos of this interesting monastery are in the followup post on Tatev.