Valinor.

"Which iiiiiis..."

Like so: ridiculously bright and glittery and beautiful, intricately carved stone everywhere with glass and metal for decoration but not, apparently, for utility; wide streetsful of tall pretty people. Singing. Lots of singing. Picturesque wilderness. The Trees.

"Ooooh!"

This place is beautiful too, it looks very ancient and uncultivated and natural.

"...it's a mountain."

And it's a lovely mountain! You did a great job with it!

"...I didn't... make the mountain..."

The people who made this world did a great job with the mountain and your civilization has done a great job maintaining it in that state.

"...I dunno what you think is going on here but... no?"

...okay.

Maybe their Melkor did the mountain?

It really doesn't seem like a Melkorish mountain! And even then, it seems like it would be good to commend the not-terrible things their Melkor did, if they have one, so he has a reasonable path to eventually having hobbies which aren't awful.

...maybe they don't find the mountain pretty? They're aliens, aliens would find different things pretty. 

Maybe?

Well, to Quendi sensibilities it is a pretty mountain. I am sorry if it doesn't suit your people, he tells the stranger.

"It's pretty, it just... nobody made it?"

Oh. Huh. Who made the world?

"I dunno? Maybe nobody? Bella thinks nobody and she's smarter than me."

So it just - randomly happened? Who made the people?

"We evolved?"

Hmm?

"From like, monkeys. I mean apes."

...okay, who made the monkeys turn into people?

"Nobody! Probably!"

...I see. Well. This is also a very nice mountain for having happened at complete random.