Tickets for the Alhambra
If you order and pre-pay for Alhambra tickets, you'll be able to avoid the (usually) long lines of people trying to buy same-day tickets. Instead, you'll go to a nearby bank of ATM-like machines. You'll need the credit (or debit) card with which you paid for the tickets.
The sales office (including the 'ATM-like' machines) is located at the bottom of the hill on which the Alhambra is located. If you're staying at the Parador de Granada (or the small inn next to it) -- and unless you have a car -- it'll take you up to an hour to walk down the hill, collect your tickets, and walk back up. In the heat that can be exhausting.
A better idea is to get your tickets before first going up the hill: ask your taxi driver to wait for you. The Alhambra. The Generalife. The Parador de Granada, room and meals.


Panoramic photo of the Alhambra.
Lions´Court - no lions.
Nice view from small terrace.
Route through Cerro Muriano