The ruins of Chicago have been mentioned, but I'm still not sure where Destiny's last city is.

Shifting back towards the middle ground between science fiction and fantasy, Bungie moves the center of Destiny's world back to a city on the surface of Earth, where they could merge the familiar and the strange, the science fictional and the fantastic.

Staten here mentions that at one point, Destiny veered even further away from pure fantasy, towards pure science fiction. This image, a concept of the interior of the alien artifact, certainly evokes Rendezvous With Rama, as well as Ringworld and, of course, Halo.

The concept of the space station evolves from a human construction to something of mysterious alien origin.

One constant element for the center of Destiny's sci fi world was a hangar where players would keep their personal spaceships.

At one point, Destiny's center was the last human spaceship from a lost civilization.

A space station concept for Destiny's center looks to me like a variation on Mass Effect's citadel.

As Destiny shifted from pure fantasy to more science fiction, Staten says they moved the idea of the center of the world from a city on the surface to a spaceship.

Another image from Destiny's time as a more pure fantasy game. This city was imagined to be Destiny's center, a bright citadel beseiged by evil forces that the player would defend.

Art Director Chris Barrett says this image encapuslated everything they were looking for in Destiny: the hopeful and inviting world; cloaks and armor, personalized guns, and heroes working together. And the space tiger.

This shot of modern weaponry in an ancient tomb is an example of the combination of the two genres that Bungie is calling "mythic science fiction".