American Ruins (2007), won a stack of well-deserved awards. Above is Dungeness Plantation, Cumberland Island, Georgia. Below is Bannerman Castle, Pollepel Island, New York.
Lost Worlds (2011), photographs of ruins in the Caribbean, Central, and South America, which I just got out of my library. It's marvelous from beginning to end. Above is Sans Souci, the royal palace of the short-lived Haitian monarchy; below is the hospital of San Nicholas de Bari, Santo Domingo.