[Kūlgrinda](https://en.wikipedia.org/wiki/K%C5%ABlgrinda) –
Undetectable from the surface, these roads were usually known only to the locals, and as such were an important element of the defense against various invaders, including the Teutonic Knights in the 13–14th centuries. Kūlgrindas provided a safe shortcut between villages, hillforts, and other defensive structures. They were built by bringing stones, wood, or gravel over frozen swamps in the winter and letting them sink once the ice melted. Such procedure would be repeated several times. Sometimes wooden posts were inserted to protect the elevated area from washing away.
This is absolutely fascinating to me and prompted me to see what else I could find online. The oldest road found – made from wood (a subset of Kūlgrinda called medgrinda) – is in Kernavė and is dated to between the 4th and 7th centuries.
How deep would the water be?
I guess we all bring something different to NATO.
In Ireland there was something similar.
There used to be huts called Crannogs — which are artificial islands in lakes. There would then be stones just under the water level enough so they weren’t visible. Locals would use them as stepping stones and knew the secret pattern to get to the island. Attackers would have to use boats.
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[Kūlgrinda](https://en.wikipedia.org/wiki/K%C5%ABlgrinda) –
Undetectable from the surface, these roads were usually known only to the locals, and as such were an important element of the defense against various invaders, including the Teutonic Knights in the 13–14th centuries. Kūlgrindas provided a safe shortcut between villages, hillforts, and other defensive structures. They were built by bringing stones, wood, or gravel over frozen swamps in the winter and letting them sink once the ice melted. Such procedure would be repeated several times. Sometimes wooden posts were inserted to protect the elevated area from washing away.
This is absolutely fascinating to me and prompted me to see what else I could find online. The oldest road found – made from wood (a subset of Kūlgrinda called medgrinda) – is in Kernavė and is dated to between the 4th and 7th centuries.
How deep would the water be?
I guess we all bring something different to NATO.
In Ireland there was something similar.
There used to be huts called Crannogs — which are artificial islands in lakes. There would then be stones just under the water level enough so they weren’t visible. Locals would use them as stepping stones and knew the secret pattern to get to the island. Attackers would have to use boats.