Wow, really impressive map. There's so much attention to detail. And I love that it uses a very classic textureset but it looks like something that could've been part of Unreal Tournament 2004, or an even more recent game. Would be great if the texture on the giant Lion head would be a bit higher res, but that's a stock mapobject you've scaled way up, no?
The only thing I found a bit jarring were the grates on the floor above the lava that are covered with what I assume to be sloped clip brushes. It just feels a bit weird to stand on top of it. On one occasion, I actually slid upwards on it, very strange. What would really be the problem with players actually standing inside those alcoves? Might invite campers, but catch a single rocket in there and you're dead.