I don't like this thread being so un-lively.
Waterfall.

Thanks for reviving it.

Screenshots of water in Quake (with Darkplaces Epsilon source port) and Quake 2 (with berserker source port).

Might run out of water, though. I don't even remember if I've posted this night shot someplace before. :<

Funny how you don't need fancy latest gen graphics to make things visually appealing. I remember some pretty views from Tomb Raider 2&3 and those games are basically made of cubes.

Guess I'll keep reviving until someone tells me to stop.
As much grief as both Dark Souls games are causing me, they offer some nice views.

Wow, that's a nice screenshot of Dark Souls.

Majula? Probably the earliest gorgeous view in the game. Somewhat generic as a result, but still pleasant to look at.
I've noticed that I have posted the Lake Mead shot twice, in this very thread, no less. I'll just let that embarrassment stand.

New Topic:
Tunnels / Hallways

Ok, I know it might sound dull, but they can be really beautiful.

Here's one from Rise of the Triad 2013.

Old graphics make me horny.

Scary, more like. Games have taught me to be afraid of corridors, especially the long, empty kind.

Or ones with pigs at the end.

Could be sexy as well, if you're in the right place! :P (Screenshots from Darkness II and Batman Arkham City)

Considering where the first one takes you and the second one has men with guns in it - still scary, though.
... I'm a pessimist.

They can also show nice architecture.

Game is Enclave (you can play it in first person).

That does look very nice, but is there something murderous waiting at the end of it?

Maybe not that one, but probably this one:

That one says "Exit", too, just to give you hope and then (probably) crush it.

I've found a non-scary one. Not exactly pretty, but a most beautiful sight after the dark catacombs.