I really have no idea what triggers these moments. It doesn't happen often to me but has happened pretty consistently throughout my life. You're right though, I wish it happened more often.: ) It's an amazing experience.
I found this video yesterday that might offer some clues to these altered states we sometimes stumble into:
Thank you! I may be heading back with my younger brother in next year. He's never been so it would be a lot of fun to show him around and see if he has a similar reaction to the city. I've also been looking at real estate over there, just daydreaming mostly but you never know! I just wish they could work through all of the immigration issues and other troubles they're experiencing now. I'm not sure whether or not they'll find a way to course-correct but there have been a lot of protests lately.