"obviously fascinating" is correct and can be used in written English.
It means something is clearly or undeniably interesting or captivating. Example: The exhibit at the art museum was obviously fascinating, as evidenced by the long line of people waiting to enter.
"That scene is so obviously a fascinating melting pot of styles that you can't help but be exposed to a lot of things," Mr. Kallman said.
As for the full multiplayer experience – limited to 40 players, 20 on each side (rebels vs Empire, obviously) – it's fascinating, but there are plenty of questions.
"I want to stay on the consumer side of things, and obviously mobile is fascinating — there's lots of functionality that's not probably not leveraged like it could be….
It's disturbing but fascinating, obviously -- she's not a pop culture phenomenon for nothing.
Obviously, it would be fascinating to take a look around, but the problem with going to North Korea is that you are not able to take a single step that isn't carefully guarded.
It's a fascinating story, obviously the most simplistic way with the opening up of private collections or princely collections to a broader and broader public, until you reach the point where collections are formed from the start for the public.
(I've never forgotten the moment, in Saul Bellow's "Herzog," when Herzog thinks, "Much of my life has been spent in the effort to live by more coherent ideas. I even know which ones"; Herzog knows everything except how to live and do good. And yet what he knows is so extraordinary. As a grad student, I led a fascinating and, obviously, somewhat ironic discussion of that quote).
So, obviously, there was something fascinating here that was going to grow.
It is closed off to visitors, for preservation reasons obviously, but it is fascinating to think that all that history lies beneath your feet, doesn't it?" Preserving that history was precisely why the Amber Trail Greenway was constructed.
