A pair of pillar-stones, male and female 2.5 metres apart, the female with large (and largely-natural) cup-mark + groove (artificially enlarged ?).
M+F paired stones are rare in France if they exist at all (in Brittany ?) though there are several in Ireland. The name of the commune is Bach, pronounced Bash. I saw these first about 10 days ago when I went to collect plants from a specialist and inexpensive nursery (dry stony soils). I didn’t have camera or phone with me, so I went back yesterday, the first of January, a beautiful day. The area is a whole département (Lot) of limestone karst, as in Dalmatia or (in miniature) the county Clare Burren. There are chasms and splits and pavements and lots of perforated boulders. I live just where the southern edge ends.
The stones are 250 cm apart, and 120, 130 high. It seems never to have been a gateway. Rubble has been piled behind them, so there is a faint chance that there might be a chamber.
The location on the IGN 2139 SB (Cahors) is in Bach commune, 500 m NW of the Mairie, on the N side of the D22 (direction Escamps) and 300 m SE of the Chemin des Bories Hautes.
I have marked them on Google Earth. For robots, the blind details are:
44°21'15.13"N
1°39'55.87"E
Anthony Weir, www.irishmegaliths.org.uk