If you’re only going to see one historical site, it should be the Whaling Museum, but if you have time for two sites, this should be your second choice. On an island of historic buildings, this is officially the oldest, built in 1686 as a wedding gift for Jethro Coffin, a blacksmith, and his wife Mary Gardner, it is the sole surviving structure from the island’s original 17th-century English settlement. The interior gives an example of the spare existence of the early settlers. A kitchen garden and an apple orchard also help put the house into historic perspective.