Describes cities, covering a time span of 8000 years, which have been excavated or restored, and speculates on the civilization of each as evidenced by what remains.
Siblings Susan and Charles receive a mysterious book before leaving to visit their Uncle Farley at his time-traveling house, where they become separated in the Sea of Time and struggle to find their way home.
"Describes the historical circumstances that led to cities such as Pompeii and Machu Picchu being lost and the archaeological discoveries that found evidence of these cities"--Provided by publisher.
Examines such archaeological remains as Stonehenge, the Easter Island statues, and the Minoan ruins on Crete and speculates about the vanished civilizations that built them.