If, by Northwest corner of Iceland, you mean the Westfjords there are many beautiful spots:
For birds: Látrabjarg cliffs
Pink beach in Raudasandur
Largest waterfall in Westfjords: Dynjandi
beautiful fjord: Bíldudalor
beautiful town and great food: Isafjördur
drive to the top of the mountain at Bolungarvík for a great view
fantastic hike and landscape shots: take a boat ride to Hornstrandir Nature Reserve
Lastly, definitely take a tripod! The colors are spectacular during 4-6 hours of "golden hour" light. My favorite time to shoot was between 10 pm and 2 am. Have a great time!