The Free Stamp is a 28-foot-tall steel sculpture by Claes Oldenburg and Coosje van Bruggen, depicting an outsized office rubber stamp tipped onto its side in a small downtown park. The underside reads, simply, FREE.
The piece has been an unofficial mascot of downtown Cleveland since 1991 and is one of the city's most photographed objects. The park is open at all hours; no admission. Combine with a walk past the nearby Federal Reserve Bank of Cleveland (free public lobby, with money exhibits) and the Old Stone Church.