Besides Brittany (especially in Carnac) and Corsica, which are

>>2460169
In Corsica there are some interesting stelae statues in some cases wearing armor/horned helmets and with long sword and daggers sculpted in them

>>2460262
Yep, there is a lot of interesting Megalithic archaeological sites in Corsica. However, as far as I know, if you go from that island towards the peninsula of Brittany, you will barely found such Megalithic clusters in Inner France.

Is this because the rest of them have been removed or desecrated or simply because Megalithic concetrations werent a widespread custom?

european and mediterranean megaliths all tend to be within a reasonable distance of coastlines. it's entirely conjecture, but my guess is that early societies that had the expendable time and resources to walk around pushing large rocks upright for shits and tricks might have had some subsistence on naval trade.

>>2460169
Skane in Sweden.

San Agustín, Colombia.