How is the spirit of a city captured in the art, architecture, and design of its subway system? Using his extensive travels across Europe, Asia, and the Americas, author David Seltzer chronicled 22 different cities —each with unique artistic and historical identities. Join Seltzer as he recalls highlights from his global subterranean travels in his new book, Transit Tourism: The Iconic Art and Design of 22 Subway Systems around the World.