The David Van Gelder Octagon House, also known as Springside is located at 21 Walnut Street in Catskill, New York.

The eight-sided plan was made popular in the mid-19th century by phrenologist Orson Squire Fowler.

A central stair rises through the house to the cupola on the roof.

[1] Media related to David Van Gelder Octagon House at Wikimedia Commons

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