Three advancements to the urban landscape that made modern city living possible.

Originally released by Bellum Entertainment, 2015. Streaming video file encoded with permission for digital streaming by Infobase on June 03, 2016.

Skyscrapers: Engineering and Construction (-56:00); --Skyscrapers: The Two Towers of Bologna (2:16); -- Skyscrapers: Modern World Living (1:51); -- City Parks: New York Central Park (2:31); -- City Parks: Princess Park (3:51); -- Subways: Necessity of Urban Existence (2:37); -- Subways: New York City (2:54); -- Origins Spotlight: High Line (1:44); -- Credit: City Makers: Skyscrapers, Subways, & City Parks: Origins-The History of Everything! (0:26); .