I had well water growing up in East Texas. I have no idea what combinations of minerals caused it, but it was pretty good and plenty cold enough straight out of the faucet.

Houston water is awful.

My grandmother’s bathroom growing up. It was honestly probably lead, because it was noticeably sweet, but it was the only water I actively enjoyed as a kid.

Wales, UK.. I call it frog water because the header tank up the hill got blocked by dead frogs in the pipe. Tank fault we drained it fixed it. Big old tank been there for many years. The water is from a spring. Unfortunate that header tanks are needed up the hill to keep a constant supply. Good old frog water though!

At home (Norway). Everywhere else tastes like chlorine or untreated swamp to me.

Hot Springs, Arkansas. They had giant public water fountains available on the streets for free to get water straight from the springs. Also some very cool bathhouses from the 1900s.

Victoria BC, and surrounding areas. The Sooke reservoir has some of the best water in the world!

Scotland.
It's delicious and cheap, and Scottish Water is a publicly owned company.

Amsterdam. It didn't taste like anything.

I'm from Melbourne and locals like to claim we've got the best water in the world but it tastes bleach-ey to me... because they put chlorine in it for hygiene reasons. It's not a health risk at the levels used, stomach acid neutralises it. After I got back from staying with family in NL I found the local Melbourne water disgusting and it took a while to be able to get used to it again.

I had some water in Geneva airport, straight from a mountain apparently, that was pretty good

Well water from a campsite I only stayed at once in the Scouts. It was sooo mineral-rich and delicious.