This map grew directly out of my first try at using hammer.
I started with the basic koth-setup as it is found in the gametype-library file from the Ultimate Mapping Resource Pack and began adding things and altering them again if they didn't seem to fit in with what I had done in the meantime.
The result is a layout with 3 spawn exits that grant you access to different parts of the map. The middle exit brings you to the left flank and is the most direct way to the point. The upper exit gives you access to the gallery above the point and to the left flank. The lower exit has ways to both flanks, but you will start on the low ground.
Thanks to LeSwordfish for including tarn_a1 into the 16.2.2012 mappool on short notice.