[kataklasm]

The whole imperial/British side has tons of ugly and weird units of measure. Reading old engineering documentation will give you headaches and nightmares from all the inconsistent systems of units.

[arnsholt]

My favourite one was when I learned about the existence of US survey feet.

[HeyLaughingBoy]

My property is very irregularly shaped with the longest straight dimension being 6" shy of a quarter mile. The really scary thing is that I recognized that immediately the first time I looked at the property survey map.