The Rokinon 14mm is inexpensive and has done me proud in many a night photo. I will make one other suggestion though, the Zeiss 21mm. I picked it up a couple weeks ago and it is now my favorite lens. It takes an 82mm filter, so it matches what you use for your 24-70mm lens. It's not nearly so wide as the 14mm Rokinon, but it's much more useful for landscape photos. It does a fantastic job day or night, and it's easy to focus. It has a hard stop at infinity, and I just roll it back a smidgen and it's perfect every time.
When I go out hiking now, I pretty much just use my 70-200mm lens and the Zeiss 21mm. I used to carry my rokinon 14mm and my old nikon 24mm ais, but the Zeiss has all but retired those two.
Two beautiful shots yorgasor. What body are you using and may I ask what settings you used for both? Thanks.