The following list are locations in the game that some might find useful during the wave survival. I have about four bases at Wave 32 because each one serves a purpose and brings forth a better sense of survival and immersion for me. Enjoy the list and please let me add your point of interest in your comments.

In no particular order:

Map Coordinates:Attraction

14x12 School -two levels and a rooftop.
17x14 Park -four fenced corners on a hillside.
15x14 Mansion -Single Entry point, Large facility with 'parapets', swimming pool and garden out back. Two floors with a basement.
14x15 Hospital -Spooky.
10x16 Small Gas Station
6x19 Big Motel
------ Air Field and Hangar behind the Big Motel. This could be your escape plan.
3x21 The Bridge -Go and see how they blew the bridge to isolate the infection. Stay for the fishing.
9x15 Train Depot
14x16 Big Gas Station -Great survival spot with plenty of reason to make it better.
23x22 The Prison -For those who want to go big or stay home.

Honorable mention: The Subway System -The last place the undead might look for you...or not.

The locations listed have all been tested for pathing and will play well. Some locations are JFF (Just For Fun).