The island has a permanent size of 4 acres (16,000 m2), and it is composed of Roxbury puddingstone (pebbles embedded in finer-grained cement) which rises to a height of 30 feet (9.1 m) above sea level.
[1] The island was first occupied by John Langlee in the late seventeenth century.
In the late nineteenth century, it was developed as part of a summer resort, and it has subsequently been the site of a restaurant and rustic observation shelters.
Today, it is uninhabited and has an interesting mix of cultivated and naturalized plants, including lily-of-the-valley, daylily, silver maple, red maple, Norway maple, cedar, Norway spruce, linden, greenbrier and poison ivy.
The island is managed by the town of Hingham and access is by private boat only.