The lighthouse is a good spot to view Batan island from end to end. On a clear day you can also see Sabtang island to the south and Itbayat to the north.
Everywhere in Batanes is a pretty picture. Oddly enough, postcards aren't popular in the northernmost part of the Philippines. But then everyone who visits is prepared with a camera - whether it's a bulky professional SLR or a simple phone camera. It doesn't matter much what you’ve got, because Batanes is that beautiful.