After a little urgin gfrom Valadarr I've put togther a short article detailing how to organize your campaign on a compuiter to make finding notes and key images a breeze to show the players or print for handouts as desired.
You come upon a ruined building in the back section of a city park (or other out of the way area of the city). The ruins are fairly overgrown. All that is really standing is a doorway and its frame. If you pass through the opened door, you travel to a different world. If the door closes, there may not be a doorway back to get you back.