Extinct cities

Dead Giveaway

Randall Garrett

Tom Swift in the City of Gold; Or, Marvelous Adventures Underground

Victor Appleton

A City Near Centaurus

William R. Doede

Tom Swift in the Land of Wonders; Or, The Underground Search for the Idol of Gold

Victor Appleton

The Motor Boys in Mexico; Or, The Secret of the Buried City

Clarence Young

Unique Ghost Towns and Mountain Spots

Caroline Bancroft