Hello from Granada,
Boy, what a difficult city about which to find information. I spent hours a few months ago trying to find the bus routes to the Alhambra, and other tourist sites. Here is what I have learned since I have arrived in Granada.
#1. Any references to bus lines C1, C2, C3, or C4 are correct EXCEPT those aren't the numbers being used. These useful busses are now the C30, C31, C32, C34. I am too messed up after today's navigating to remember how the two numbering systems match up. Last night even our host said we should use bus C1.
#2. Once on the bus there is no map of the srops, nor is there an electronic read out of the next stop. The only way to know where you are is to count the stops. Each stop has a sign with all the stops listed with the current stop printed in red. The font is about 7. Plus these signs face walkers on the sidewalk and your line might be facing away from you.
#3. The tourist offices, if you can find them, DO NOT have city maps with bus lines drawn on them. If you want bus maps, I only found one set of bus maps on line for the basses I have mentioned. They are funky, blurry, and really primitive. But they are accurate.
The tourist offices DO NOT have useful maps of the Alhambra. I guess you get one at the gate of the Alhambra and then can spend your time planning which gate you should have gotten off at.
I found a tourist office today across the street from the "northish" side of the cathedral. Rick does not show this one. All tourist offices I have encountered in Spain seem to be hidden or dusguised. Look for a blue 'i' on a white field of a circle. These signs are usually flat against the side of the building or one of its windows.
#4. Beware of the maps you do get about Granada. Many don't conform to the standard of north being at the top of the map (even online). The 'city map' from the TI has north at about 45 degrees off center. This may explain why any two maps may show the Alhambra in a different setting. One map, it is to your right, the next map it is down and to your right.
#5. The audios at the cathedral are dreadful. And if you use them, take a photo of the map on a white stand inside the cathedral near the entrance. It has the places of the audio located. Otherwise, the audio will say, "now move to spot #6" and you will have no idea where that is. The numbering in the cathedral is a bit of a maze.
#6. Beggars are everywhere. Decide when and how much you will give each day, or you will be broke.
Wayne iNES