If you have not checked out Periscope I'd encourage you to if you are a photographer. The app is a great resource for seeing behind the scenes of shoots or great location scouting from top landscape photographers.
Periscope is a live-streaming app that allows folks to broadcast on from their phone in real time and allow people to watch and/or comment. It's still early in production and has a few quirks like 'portrait only' mode. We hear landscape is on the way.
With the introduction of Meerkat, Twitter put the Periscope app up on the market around the same time. I find Periscope to be more user friendly and you can follow/watch people much more intuitively.
A list of people to follow below is a great way to start. They are very active and show some great feeds. This is a list of folks that are very active. Follow them on twitter already? They will show up in your "Who to follow" when you start up the app.
Let me know your thoughts in the comments. It's been fun so far checking out live photo shoots, product demos, behind the scenes, etc. Here is a link to some news on the app.