(I think there is a pretty good chance that INJ is also the person here who has been up the highest (while still staying on the ground) though I might be wrong about that.)

flerdle) It may well be Dujon, then, for current residence. My feet-on-the-ground record is El Teide in Tenerife, 3717 m or 12,196 ft. The air pressure there is about 64% of sea-level pressure and you noticed it. Quite a lot of puffing and blowing climbing the few hundred feet from the cable car to the summit. Water would boil at 88°C, just about enough to thicken gravy but not enough for a decent cuppa.

I spent most of my first couple of decades at around 1000ft. It didn't seem very high at the time, probably because it isn't.

I lived for a year at about 420m on the Swiss/French border. It didn't feel at all high, because everything around was so much higher, namely the Jura mountains to the west, and the Alps etc to the south-east.

[Rosie] When I typed that about INJ I was vaguely thinking "we already had this conversation not so long ago", and your Tenerife posting reminds me that indeed we did.