Luna Creek City has not been shown in any of the comics as of yet. It can be assumed, however, that it bears appearance to a typical city with skyscrapers and the like.
Luna Creek City was built in 2004 CE as one the three great cities to protect the populace from the negative effects of the Dark Apocalypse. It can be assumed life in the city was generally peaceful and the citizens lived happily. However, in 2083 CE (before the events of Psychteria), the city is completely annihilated by "a monster."