The border between Spain and France dates from 1659, when the Treaty of the Pyrenees was signed. It is marked with more than 700 border markers from sea to sea, dating from 1868.
There are additional markers around Llivia, an Spanish enclave within France.
The border is documented very well by Eef Berns (The bordermarkers of the Pyrenees).

I have visited only a small part of the border, in the surroundings of Llivia.
On my way walking from the train station of Latour de Carol - Enveitg towards Llivia on November 9th, 2025 I pass the markers 472, 473 and 474.
These were all coincidental finds, I had not prepared anything for this part of the border. Especially number 472 was hidden pretty well.

I have actually been here before, because exactly this location was the place where I entered Spain for the first time in my life on August 10, 2010. That day I was walking from the train station Of Latour-de-Carol - Enveitg as well, to a geocache just inside Spain and back.
I even made a quick picture of marker 474, long before the start of my border marker hobby.

---

On November 9th, 2025 I am also visiting the first border markers of Llivia. Number 1 is on the entrance road that connects Llivia with "mainland" Spain. This is a neutral road, Spanish people have always been allowed to use the road to travel to Spain. There has been some commotion regarding French stop signs along the road, I won't go in depth here, I recommend The Tim Traveller on this topic. From marker 1 I could have walked directly to my hotel in Llivia, but walking along this busy road is not very nice, so I decide to follow a (partly flooded) path and meadow that bring me to marker 2.
Marker 3 is near the river El Segre, I can spot it from the path I'm on. I assumed I would never be able to find all the markers during the two nights I am in Llivia, so I did not take the time to walk to this one. Marker 4 is right next to a pleasant footpath connecting Onzes with Llivia.
Marker 5 is actually very close to the path as well, but I didn't know that at the time. I did not visit marker 6, although I was pretty close to it the next day.

---

The next markers are actually the end of my walk on November 10th, 2025.
On this day I visited most of the border markers of Llivia, in reversed order.
Markers 7 and 8 are in the middle of fields. I can spot them both from the paths I'm following. The markers 9 and 10 are next to a small airfield.
Marker 10 is also part of the French measuring point network, if I understand it correctly. I decide not to try to reach the border markers 11, 12 and 13. It was actually the end of the day already and I didn't have too much daylight left.
The way around through France took just as much time possibly, but it was the safer option. Between border markers 12 and 13 is a river that I probably couldn't cross.
Border markers 14 is easy to find, along a path. There is actually a series of geocaches at the border markers around Llivia, 31 markers have their own geocache at the time of my visit.
To my surprise this includes multiple markers that are in locations that are actually pretty hard to reach.
This is not the case for marker 15, it is easy to reach and the geocache is directly next to it. I crossed a field between markers 15 and 16.
There are supposed to be two markers with number 16 on both sides of the road, but the nothern one has disappeared. From here on the border follows the road for a while. There are also two markers with number 17.
After number 17 the border follows a path. The next markers should also be double, but I didn't know this at the time. Therefore I only found one of the markers in three cases: 18 on the southern side of the path, 19 and 20 on the nothern side of the path. After marker 21 the border leaves the path and there is a marker 21-BIS nearby.
From here on the border will follow a stream towards the north. Border marker 22 seems hard to reach, I decide not to go there.
Marker 23 is on a path, about 300 elevation meters up from Llivia town. Marker 24 is reachable with a small detour and finally crossing a stream behind the sewage treatmant plant.
It is the first marker that is not a stone, but an inscription in an existing rock. Can be relatively hard to find in autumn. Between marker 24 and 25 is quite a steep slope, but it is doable.
Marker 25 is probably in the heighest point of Llivia. Marker 26 is an inscription on another rock face, well hidden between other rocks and trees.
I can't find marker 27, despite searching quite long. It should be on a rock as well.
Probably the one I photographed based on the pictures Eef made before, but in that case the inscription is very hard to recognize. Marker 28 is a regular border stone, but 29 again an inscription on a giant boulder.
The original inscription is on top of it. Marker 30 is hard to find, an inscription in a rock on ground level, especially now in autumn with leaves covering it.
It takes me quite some time, but it pays off. Next up are four markers on both sides of a small stream, making up 8 markers in total. At markers 34 I am surprised by this information sign and bridge. The path continues for a bit in the direction of marker 33 but seems to stop a little bit further. Marker 35 is on the entrance of the field that eventually leads to markers 34. Marker 36 is close to a road and is one of the more accesible ones. The marker 37 and 38 are in terrain that is much rougher than I had expected.
There is a terrace-like landscape, but the border crosses this more or less diagional, not taking the landscape into account at all.
The terrain contains lots of thorny shrubs. I made quite a large detour between markers 38 and 39, all the way via marker 36 following the road and a path from there.
I guess it is much better to follow the slope north-south in a more straight line to 39. Next up is marker 40, another rock face inscription.
Marker 41 is a classic border stone along a path.

---

I did not visit marker 42, but I did visit marker 43 on the first day in this area: November 9th, 2025.
Marker 43 was much harder to reach than I had expected. I followed paths from marker 44, then reached marker 43 from the east. I entered Llivia at marker 44 on the same day. This marker is next to the main path leading towards Llivia from the village of Ur.
Marker 45 is somewhere inside the fields. It is the last marker at the border of Llivia, but I did not visit it.

---

Along the road leading from France towards Llivia is an old stone, not far from the buildings of Llivia.
This stone, "Pedra Dreta" according to a geocache description, is very old, it is possible that it has been used by the Romans already.
It is not quite clear to me of this stone was on the location of the current border marker 1 originally.

---

On November 11th, 2025 I am leaving Llivia again and on my way to the train station of Puigcerda I pass this bridge, where two markers with number 480 can be found.