I was waiting for your response. I had you in mind when I was writing the thread.

There are some outdoor venues that have great sound.

I cannot remember exactly the year 70 something. But I went to Tanglewood Music Center.

The Who did "Tommy" and Jethro Tull opened. It was the first time rock was played there. In fact National Geographic wrote a piece about it.

I have not been to Red Rock Amphitheater in Morrison Co. https://www.redrocksonline.com/

But my son has been there many times with the Bonamassa tour. He has run the catering for the tour for twelve years. They do 200 dates a year. That includes both the US and Europe. Albert Hall included. Pretty much every major venue in Europe and the US.

Jade MacRae my son's wife has played the tour but also does solo tours in Australia and New Zealand. She has been performing professionally for over twenty years.

I will ask her about her favorite venues.