Many travel and tourism websites do use Instagram as feeds. To my knowledge many in Florida and Louisiana do. Visit Florida pick up on hashtags ( #LoveFL for example) that are placed by legit travel photographers.

Certainly Millennials like to share their travel experiences and use Instagram for that. Zoomers (Boomers with zip!) tend to behave very like Millennials, and also share experiences. I wouldn't agree that it's a place just for youngsters and 'duck lips' images - I love that description by the way.

Yes, 500px is a good place to go.