Despite being 2.7 miles apart, these two Lighthouses, Boston Light and Graves Light look very close together when viewed from Fort Revere in North Hull. Here is a shot of Boston Light in the foreground, with Graves in the back, while a fishing boat cruises past in Nantasket Roads.
The area separating these two lighthouses is very dangerous and difficult to navigate by boat. It is full of rock outcrops, shallow shoals and small rocky islands, as can be seen in this photo. I have a similar photo of these two lighthouses as seen at sunset from the same location, which can be seen here.