What places have you been that have had a positive impact on your mental health?

First off, I understand there are many times where it doesn't matter where you go, your issues won't just go away. That being said...

I want to know places (cities, towns, countries) where you felt living there or the environment had a positive impact to your overall mental health?

Which ones had a negative impact? Why?

Possibly these cities or places have things in common to you such clean, ease of public transport, ease of access to healthy foods and gyms, certain weather patterns, culture, social life, walkability, etc.