There are some large spiders roaming around Nantucket right now, specifically, Carolina wolf spiders (Hogna carolinensis). Not to worry though, they are harmless.
This is the largest spider species in New England with some individuals bigger than the palm of your hand. They run around at night hunting insects and then hang out in their burrows during the day time. Happening upon their burrows is the easiest way to find a population. Look for perfectly round holes surrounded by a ‘turret’ of grass or sticks.
The pictures of the burrows were taken in November 2015 at the Quaker Cemetery. Interestingly, there is a Carolina wolf spider specimen in the MMA biological collection dating from 1929 collected from “the fields near Vestal St”. The spiders living at the cemetery are probably descendants of the population sampled in 1929!