John B. Walkup House, Crystal Lake

John B. Walkup was an early settler to the area and the founder of the town of Nunda. This fine example of Greek Revival architecture is in near original condition and is one of the few remaining cobblestone houses in McHenry County.

Famed cobblestone mason Andrew Simons constructed the house of water-smoothed cobblestones brought from Lake Michigan in 1856. Classic features include cornice returns, lintels, 6-over-6 light windows, a front door surround including a transom with side light windows, and a decorative patterning of smaller cobblestones near the peak.