Sunday, October 22, 2017

Kirkkonummi Caves

I said that I only knew four caves in Kirkkonummi. I should have checked the Suomen Luolat book, however. Or even my own archives which said I've been to five...

There are actually the following ten caves in Kirkkonummi, based on the book, Retkipaikka, and my own research:
  1. Korkberget, the big one on the shores of Humaljärvi, includes several smaller side caves, roof caves, and underground crack caves. The book missed the scale of this cave. There's a map.
  2. Högberget, the erosion cave, includes I think several other small boulder caves (one listed in the book separately). There's a map and separate article about drawing this map.
  3. Gruvböleberget, the roof cave that I reported about yesterday. There's a map.
  4. Kasaberget, in Strömsby. There's a map.
  5. The Majvik roof cave. Not listed in the book. There's a map, and a separate article about drawing this map.
  6. Ormberg, or the Snake Mountain Cave. On a closed military area. Coordinates: N 60.042016737 E 24.364661980.
  7. A secret 2x1x1m cave in someone's yard in Hirsala, perhaps somewhere around here per the only partially released coordinates.
  8. Boosecliff Cave (Viinakallion luola) in Veikkola. Coordinates: N 60.251220380 E 24.482196209.
  9. Mountain Hill Nomad's Cave (Vuorenmäen kulkurinluola), also in Veikkola. Coordinates: N 60.269348353 E 24.430606378. There's a map.
  10. Kakarberget Cave, yet again in Veikkola, but more of in the middle of nowhere. The nearest place is "Laitamaa" or something like "out-of-center country" in English. Coordinates: N 60.243448028 E 24.496705969. There's a map.
So, at least five more places to visit. And I can't believe this is it, there must be more small caves that haven't been listed.

Photos (c) 2017 by Jari Arkko

Saturday, October 21, 2017

The Sonnimäki Soviet Bunkers

Bunkers... where we were supposed to find a bunker was what seemed the remains of two regular houses, one with a basement. But a hundred meters away we found an almost intact Soviet bunker.

Finally, we could better see the design of this basic form of the bunkers in the Porkkala parenthesis area. This is the most common, small bunker form. A few of the bunkers are of the larger, 2-story variant with round hole for a large 100 mm gun. But the basic bunker here in Sepänkylä has this floor plan:

Other bunkers of the same form can vary on where the gun is placed -- in many places it is sitting on top of the bunker rather than on the side.

Coordinates are as follows. Remains of house #1: N 60.15993087 E 24.47873539. Remains of house #2, with basement: N 60.15975614 E 24.47831369. The intact bunker: N 60.16092596 E 24.47613065.

Pictures from the bunker:

Pictures from the house with basement:

Pictures from the house ruins:

Cars nearby:

Photos (c) 2017 by Jari Arkko and Jarmo Ruuth. All rights reserved.

Gruvböleberget Roof Cave

Kirkkonummi underground <3 And Retkipaikka told us of yet another cave in Kirkkonummi.

So far, I've visited three others: Korkberget, the largest and most complex (perhaps even in all of Finland), Högberget, a beautiful small erosion cave that can bring other things to mind, and the small roof cave in Majvik. Are there others?

Retkipaikka told us about Gruvböleberget roof cave, so we hiked to see it with Jarmo. Access wasn't easy as the forest roads leading to the place were closed off or undriveable in many places. In the end we walked to the cave from Kvis (drive Kvisinpolku as long as you can, then park).

We found a nice stream gushing with water, and close to it a large cliff, with an overhanging roof that forms an area shielded from rain. The definition of a Finnish cave includes such roof caves, as long as you can fit several people under it.

I also drew a map, based on very rudimentary measurements:

There is also a high-res JPG and PDF version of the map. And here are some more pictures:

A tree that has flattened because the cliff didn't allow it to grow in the usual circular fashion:

The stream that we followed for a bit to get to the cave:

Photos (c) 2017 by Jarmo Ruuth and Jari Arkko. All rights reserved.


The flights from Sweden were incredibly booked this week, so I ended up in returning home on an airline that I've never heard of before, 2N or Nextjet. And interesting routing, via Port. And there was an interesting rust on the airplane...

But we made it to Helsinki :-) and it was interesting to land to an airport that was covered by a thin layer of fog in the night.

Photos (c) 2017 by Jari Arkko. All rights reserved.

Friday, October 20, 2017


On the way back to the airport and home, I stopped at the yet another place on the Korvlinjen, this time in Arninge, a village in Täby. There was supposed to be two fortresses or bunkers here. I found one fortress, but could not get in, and did not find the other one.

Västrä Arningefortet is maintained by the landowner, and in reasonable condition. But, unfortunately it also locked and impossible to enter. Sad. Östrä fortet was supposed to be a half-collapsed structure, but by now I was starting to run out of the 20 minutes I had for the stop in Arninge, and would soon have to get to the airport and start my conference calls. I kept crisscrossing the thick forest, but found nothing, except a trench. I must have been close, but the almost impenetrable forest perhaps kept me from finding the actual bunker.

I also had not taken proper GPS coordinates, but was going simply on the rough direction from an inaccurate map and the Google Maps indication of "Systembolaget" in the forest where the fortress was supposed to be. I figured the local winos are perhaps camping out in the bunker, and have given it a name... but no, nothing on those coordinates. Odd.

The actual coordinates for the Västrä fortress are: N 59.463344 E 18.124656 and for the trench that I found for the Östra fortress: N 59.459962 E 18.132322.

More photos of the Västrä fortress:

The trench that I found around the Östra fortress:

The Uber taxi waiting for me near the Östra fortress:

Photos (c) 2017 by Jari Arkko. All rights reserved.

100 Articles!

The 2nd Korvlinjen article was the 100th blog article I've written this year. Quite a number. I've attempted to do more explorations, often local things like caves and abandoned bunkers or interesting swimming pools, in addition to the usual skiing articles.

I'm trying to run this blog as a journal of my adventures, whatever they may be, and this month I've succeeded in writing something almost every day. And the change in the work that I do has also enabled me to have a bit more reasonable working hours since April, so I do have some free time in the evenings to go do some things. That's good.

Incidentally, with the publication of *this* article the count is now 101 :-)

Photos (c) 2017 by Jari Arkko. All rights reserved.

Thursday, October 19, 2017

Mera Korv!

Mera korv, more sausage? Once again I'm in Kista, but wanted a quick outing in the evening after a long day. The answer was once again Uber to another bunker on the Korvlinjen.

Only this time the darkness fell earlier, and I made a mistake in leaving my computer power supply to the office. While I sprang from the taxi to office to fetch it, more minutes passed. When we arrived at the Prästgården village near the bunker, it was already dark.

I did have (one) flashlight, however, so took that out and set out in the forest. Fortunately, there was a path, and it did lead to the bunker.

And the door was open. Quite inviting, unlike back home in Finland where the bunkers from Russian occupation have been blown up. The sensible swedes have stayed out wars for couple of hundred years, so these bunkers have only been damaged by time...

... and skaters and tag-painters. Wood planks had been setup throughout the bunker to act, I guess, as skating platforms. And the whole inside was painted in one way or the other.

While the taxi was waiting, I quickly took a few photographs, made sure I had walked through the entire structure (I think), and headed back. Another day, another bunker. If you want to visit, take a look at the map of Korvlinjen's remains.

By the way, my underground adventures have been listed on the map at (there's also a more traditional listing). The map makes it possible to look at various locations, and by clicking on the pins on the map, you'll get to the article about that location. There's also a similar page at I have plans to add more features, like menus to choose articles on places where there's more than one article about the same location, pointers to cave maps, etc.

Note that in Sweden some of the cave locations on the map have been obfuscated because the locations are not publicly known; you have to be a member of the local caving association to have access to their caves database, and I don't want to publish locations I've learned from that database. But it is a fun crowd, so if you are interested in Swedish caves, do sign up! And the Finnish caving association can be reached here, do sign up there as well!

Coordinates: Prästgårdsfortet, Täby, N 59.482798 E 18.064322.




Car waiting for me:

The forest path:

Photos (c) 2017 by Jari Arkko. All rights reserved.

Wednesday, October 18, 2017

2nd Majvik Bunker

And now, with batteries in my flashlight... I stopped at another bunker in Majvik on the way home from the office.

This time it was obvious that one could enter, and I did. The bunker's main exit tunnel is still mostly intact as you look at it from inside, but ends abruptly, as if it was closed off on purpose. The upper small exit hole was what I used to get inside. A bit of loose, broken concrete pieces around, so treading carefully... interesting partially broken rooms, stalactites starting to form.

This place is next to a walkway, 100 meters from the Majvik facilities parking lot, very easy to find. Coordinates: N 60.16660530 E 24.54916611. And again, warning, the bunker is unstable and dangerous!

Outside view:

Ventilation duct:


Photos (c) 2017 by Jari Arkko. All rights reserved.