Technology

No, I get it, I just think it would be cool to build a structure that way. You'd have to fill in the gaps, but people made lots of buildings like that once upon a time.

Well...I bet that there's some sort of buildings that use dry stone.

I think that there are old forts in Britain done like that. I was into looking at pictures of fortifications at one point.

googles

Brochs in Scotland:

https://en.wikipedia.org/wiki/Broch

In archaeology, a broch /brɒx/ is an Iron Age drystone hollow-walled structure found in Scotland. Brochs belong to the classification "complex Atlantic roundhouse" devised by Scottish archaeologists in the 1980s.

Brochs are roundhouse buildings found throughout Atlantic Scotland. The word broch is derived from the Lowland Scots 'brough', meaning fort. In the mid-19th century, Scottish antiquaries called brochs 'burgs', after Old Norse borg, with the same meaning. Brochs are often referred to as duns in the west, and they are the most spectacular of a complex class of buildings found in northern Scotland. There are approximately 571 candidate broch sites throughout the country, according to the Royal Commission on the Ancient and Historical Monuments of Scotland.