Underground worlds

Explores the history of the underground transportation systems, including subways, tunnels, roads, and more.

"A . . . look at subterranean city spaces, this book takes readers on a tour through vaults, tunnels, shopping malls, and pathways built throughout the world. Cutaway illustrations and maps help readers understand how cities were built from the underground up"--Publisher.

Text and illustrations introduce readers to the history of ancient structures such as underground churches, markets, mines, and burial chambers.

Explores the history of the underground transportation systems, including subways, tunnels, roads, and more.