Falls of Clyde is the last surviving iron-hulled, four-masted full-rigged ship, and the only remaining sail-driven oil tanker. Designated a U.S. National Historic Landmark in 1989, she is now a museum ship in Honolulu, but has deteriorated to poor condition and is not open to the public. In September 2008, ownership was transferred to a new nonprofit organization which intends to restore her.