Earthcam allows access to hundreds, if not thousands, of webcams showing images from around the world.
You can click on a world map to identify which ones you want to see. You can also create your own list of favorite webcams. Both options would work in a classroom as part of a geography class. The site is certainly accessible to all levels of English Language Learners.
From what I can tell, there seems to be some screening to ensure they’re appropriate locations.
I’ve placed the link on my Geography page under Sites That Cover Many Areas.