Nice Lighthouse at the very South of Tenerife. More info in Wikipedia.
Photo tips: Both mornings and evening can be very nice here as you can photograph it either from East or West. The vegetation around creates very interesting foreground.
Getting there: The shortest route is about 2.5km hike from Palm-Mar. Park at the South of this little town (Calle Cernicallo) and walk the rest. It's quite an easy and nice walk, just a bit dusty.
I didn't plan to stay here until the night, but the weather was nice and the location so beautiful that I waited somewhat longer to get a night exposure as well.