I have a strange one that hits me so strongly every time.
My friend works in a new build office and on days that I am working over on her side of the city I meet her in her office and we walk to the bus stop and travel home together.
when she is packing up each evening, she puts some stuff in a small meeting room out the way, and then brings it out in the morning.
I carried stuff in once to help her…and oh my goodness the smell. I don’t know if it’s the wood, or the fact the building is fairly new, possibly combined with a slight smell of sweat from people during the day (sorry)…
….but it reminds me my dad.
when I was a teenager he converted his loft into an office as he became self employed and was working from home. He did it over a summer and I helped him with it. Again, not sure if it’s the wood, fresh sweat…..I don’t know. But these two places are the only times I’ve smelt that particular smell.
My dad died last year and I’m just heartbroken. Doing ok, but heartbroken.
As strange as it sounds, as soon as my friend messages asking if I’m around and will I meet her at her office, that smell is the first thing I think of, and more or less as soon as I arrive I start carrying stuff into that room for her 
Dont know what it is that hits so strongly, but it always does.