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Roosevelt Island Smallpox Hospital: New York’s Forgotten Gothic Ruin

The ruins of the abandoned Renwick Smallpox Hospital are located on Roosevelt Island in Manhattan, New York City
The ruins of the abandoned Renwick Smallpox Hospital are located on Roosevelt Island in Manhattan, New York City
ID 378224092 | Monastery ©
Maria Kmecova | Dreamstime.com

Since the dawn of the 21st century, Roosevelt Island has been hailed as a sleek and very desirable strip of land rising from the East River. Located between Manhattan and Queens, Roosevelt Island is home to a handful of parks, Cornell Tech’s state-of-the-art campus, and numerous residential towers. The ruins of a Gothic building that once served as a hospital for smallpox patients on the southern tip of Roosevelt Island harkens back to a past which is very different from the present day.

In the 19th and 20th centuries, Roosevelt Island—which was previously referred to as Welfare Island—was considered a quarantine spot for residents of New York that care forgot. Prisoners, recently arrived immigrants, and people suffering from virulent diseases such a smallpox were all consigned to Welfare Island.

In 1859, architect James Renwick, Jr. designed a Gothic hospital tailored to treat smallpox patients who did not have access to the smallpox vaccine—which was introduced in 1796. The Renwick Smallpox Hospital was intentionally built at the very edge of Roosevelt Island so that the patients would be as isolated as possible from the inhabitants of New York City.

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Ruins from the Smallpox Hospital on Roosevelt Island in New York City
ID 33288199 ©
Sean Pavone | Dreamstime.com

As smallpox cases receded in the United States, the Renwick Smallpox Hospital was converted into a teaching hospital for nurses. In the mid-20th century, the teaching hospital relocated, and Renwick’s magnificent building—which looked like a stately castle—was abandoned and fell into disrepair.

Starting in the 1970s, there was a push to preserve what remained of the Renwick Smallpox Hospital. Currently, the Renwick Ruin—as architect enthusiasts call the structure—has no ceiling or floor. The Renwick Ruin is fenced off, but visitors can explore the perimeter and peer through the glassless windows at Manhattan’s modern skyline. The façade of the Renwick Smallpox Hospital can also be viewed via boat from the East River.

The abandoned ruins of the Renwick Smallpox Hospital, 1856, covered with deep red ivy
The abandoned ruins of the Renwick Smallpox Hospital, 1856, covered with deep red ivy
ID 173645771 ©
Linda Harms | Dreamstime.com

Visitors can reach Roosevelt Island by taking a ferry, subway, or aerial tram. Surveying the ruins of the Renwick Smallpox Hospital is a very powerful way to view a remnant of New York’s tumultuous past.

New York is celebrated as a sophisticated, modern city where some of the most elegant people in the world walk the streets. It is important to remember that New York’s evolution included many vulnerable people who risked everything in an attempt to improve their lives. The Roosevelt Island Smallpox Hospital is a calm spot to consider the many layers of New York’s complex and fascinating history.

UnusualPlaces Field Notes

Location
Smallpox Hospital ruins, inside Southpoint Park, southern Roosevelt Island, New York City, USA (exterior only; ruin is fenced off)
Access
The Smallpox Hospital is a fenced, unsafe ruin and is not open to visitors; do not enter or approach through the fence. Southpoint Park is public open space nearby, but current sources do not establish a guaranteed viewing spot or visitor route to the ruin. Check RIOC park notices and remain on open public paths.
Admission
No public admission or ticket is offered for the fenced ruin. Nearby Southpoint Park is public open space; park entry does not grant access to the hospital site.
Time needed
No visit duration is published for the ruin, which cannot be entered. Time spent viewing from permitted parts of Southpoint Park depends on your walk through the park.
Best season
No preferred season is published for the closed ruin. It can only be viewed from the surrounding outdoor park where permitted; comfort depends on weather, so check conditions and current park notices.
Opening hours
The ruin has no public visiting hours. RIOC does not publish visitor hours for the ruin itself on the checked pages; follow current Southpoint Park signs and notices.
Facts checked
2026-10-29
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