Manhattan · NYC landmark
The Octagon — former asylum entrance
888 Main Street, Roosevelt Island — historic Octagon tower · Manhattan, New York City
The retained asylum entrance explains the island’s institutional past and can be seen on an exterior walk.
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NYFE Summary
The eight-sided tower was the entrance and administrative center of the city’s asylum on Blackwell’s Island. Patients faced overcrowding and poor food. Charles Dickens admired the building during his 1842 visit but also described the distressing conditions inside.
The institution later became a general hospital. Its long wings were demolished, while the central tower was retained. The stone sides, paired windows and tall mansard roof preserve the outline of that entrance building.
NYFE summary from the official history and visitor sources linked below.
Plan a visit
Check the operator’s current opening, admission and access information before travelling. Historic status does not guarantee public access to every interior.
Official visitor information ↗