Hello Obsidian Portal!
For your consideration, I present my group's campaign Athos : The Return. I think it's a great example of where the mind of the players and DM came together to create a fantastic and immersive world. This campaign has been running for nearly three years and we have nearly 60 adventure logs (61 sessions, 58 logs - session 62 next week!) Our campaign has some custom CSS, but what really makes our campaign shine is the dedication that the players and myself have put into the lore and info on this.
D&D 4e is often looked down upon due to its heavy focus on combat, but I think we've really pushed the boundaries here to make a campaign that's above and beyond textbook 4th edition.
Please let me know what you think, and consider us for the Campaign of the Month!
Currently, OP is having an issue with embedded videos. Our campaign utilizes this, so please judge kindly in regards to our video not being up.