Campione d'Italia is an Italian enclave inside Switzerland.
We visited Campione as a two night stopover on our way to Malta by train. It's a nice place located on the Lake Lugano, and we could find a much cheaper place to sleep here than inside Switzerland.
To learn a bit about the history of Campione d'Italia I recommend watching this The Tim Traveller video, which was coincidentally filmed almost at the same time as our visist.
Of course I couldn't visit Campione withouth trying to find some more border markers, other than the obvious one near the "city gate".
In the end I tried to visit almost all of the border stones on our full day in Campione: May 11th, 2024
I came fairly unprepared, but provided with a topographic map from the great Swiss topographical service.
The archived website of Mats is pretty usefull for the southern part.

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The northern point of Campione can only be reached from the Swiss side. A stream flows out in the Lake Lugano here. Directly next to a small bridge is a border stone, that is on the map as marker "0"
It does not seem to have an inscription "0" on the marker. It does have the year 1921, similar to most of the other border stones we will find here.
It is in a concrete foundation, since 1984 apparently, because that's the inscription in the concrete base.
Of course I couldn't help myself and I climbed under the bridge to make a nice picture while we were having lunch here.
This is a great quiet place to visit, it's a 3 km walk from the center of Campione (about 200 meters up and 200 meters down), or one could take a boat to Caprino (San Rocco). For the first meters untill border marker 1 the stream seems to be the border. Border stone 1 is down near the stream, but is easy recognizable because of the red pole above it. I assume there has been a sign on it in the past, as we will see at most the next markers as well.
After border stone 1 the border leaves the stream and continues on to a rough mountain side. I try to reach marker 2, but I'm not sure which way to go and the drops are quite steep, so in the end I stick to the path, which is not in the best state anyway.
If you follow the stream a little bit further into Switzerland you will find a beautiful but forgotten place. A waterfall together with a few dilapidated buildings. The area around the markers 0 and 1 is a nice place to spend some time. There are some "in between" border markers with a letter behind it. Border marker 2 A is the next one we can find. I can reach it from the road (Via al Lago).
It is more or less on private property, but there are no signs. There is only a low fence that can easily be stepped over and the small building I have to pass is uninhabited, other than a lot of salamanders that do live there. Directlt next to the marker is a red pole with sigm, which we will see at almost every border marker along the border here.
The markers 2 B and 2 C are harder to reach. We cannot find an entrance without ignoring private area signs. Marker 3 might be on private area as well, but when you try to reach it from marker 4 you can easily get there without crossing any fences or ignoring signs. You might even be able to walk further to marker 2 C from here, but that one is too close to a building to my liking.
The view to Campione from here is great. Marker 4 is the first one we could find on our walk today. It seems to be easy accesible on the map, but is a few metres away from the path, between brambles on the Swiss side and with a steep rock face on the Italian side Border marker 5 seems to be on private ground, we couldn't reach it. Marker 6 is near an Italian picknick spot, which can only be reached from Switzerland. A small path leads to marker 7 A. There should be a marker 7 B further down the path, but it was inaccesible from both sides. After 7 A we concluded our morning walk along the border. In the afternoon I continue along the southern part of the border on my own. I couldn't reach marker 7 B. Border marker 8 is the ast one I could find. It is hard to reach it. There is a path coming from the south that doesn't really go anywhere and ends up in the forest. When I try to continue my walk from marker 8 in the direction of 7 B I end up climbing a steep gradient in the end. Marker 8 is a nice and forgotten one. Marker 9 is a nice one as well, located on a steep gradient 9 A is not forgotten, but has been painted and is directly next to a path. There have been some works here recently, including a new crossing of this .. . Border marker 10 is near a path that looks like a lot of other paths in this area. A bit forgotten and poorly maintained.
When I was there I couldn't find the border stone. In the end I found out, thanks to Mats, that the giant rock is actually the border stone itself. There should be a marking engraved in it similar to marker 6 B, but I did not look for this at the time, because I did not expect it here. The next border stone is a special one. On one side it seems to have the year 1596 and the text AROG, which refers to "Arogno", the municipality on the Swiss side. The other side has C.A.P which probably refers to "Campione" and the year 1797 (?) which is actually the year that Napoleon Bonaparte reached this area and (probably not coincidental) Campione and Arogno had a border dispute, according to Wikipedia. It also has the current number "11", but I assume that's a later addition. I couldn't find a lot about this stone and I'm still curious if someone knows more about the history. The next markers are located next to a road, but quite some meters above it. There should be a path on the Swiss side of the border which leads to the markers closer, but I was happy with pictures from down the road as well. Marker 13 is located next to an interesting building.
This is about the highest point of Campione, reaching almost 600 meters above see level.
There should be markers 13 A and 13 B as well, but these are located in a area that is difficult to access. The next border marker is located in the southeastern corner of Campione.
There is a municipal border stone as well on the other side of the creek, marking the border between the Swiss municipalities of Arogno (A) and Bissone (B) From here the border follows a stream in the direction of the lake. It's quite a descent and the next sign marks the end of the stream. This border marker 14 A is not a stone, but is a plate inside the wall, indicating the border makes a slight turn here. Close by plate 14 A is a quite new looking stone 14 B, near a driveway. The road is almost fully Swiss. The border goes in an almost straight line to the only road crossing into Campione. There should be a marker 14 C on its way down, but I couldn't find this one. There were construction works going on as well. Now we have reached the Piazza Indipendenza, where Mussolini built an ornamental gate in the 1930s. This is the only road crossing from Switzerland into Campione. The most famous border marker of Campione is placed here as well. It is marker 15, which is dated 1935. Most of the other stones have been placed in 1921. This one was probably placed together with the new gate.
From here the border follows a brick line through the asphalt. There used to be a second marker 15 on the end of this line, in the form of a plate similar to the one at marker 14 A.
I didn't know this when I visited, but took a few pictures of the place. The plate seems to have disappeared unfortunately. The border follows the road northwards for some tens of meters, before turning to the west a last time near a chapel.
Border marker 16 should be here, but based on old pictures it probably has disapperead as well.
On the Swiss side there are construction works going on. On the Italian side there is a cemetry and a church. The last marker is located down by the like. From the lowest level of the cemetry one has to go down one step more. This is a kind of allotment and not part of the cemetry anymore, and can only be accesed from the north.
On our first night in Campione we were on the lowest level of the cemetry, where I thought I could see the border marker.
However the gate leading to the lower level was locked and I did not want to attract the attention of some people sitting down by the water.
So on the second day I returned, only to find out that the gate was open right now.
Therefore I can conclude this page and the walk around Campione with the nice marker 17, without having to climb any fences.