19. Diverse technical systems crammed into compact spaces typify modern cities. A Berlin tourist boat cruises up the Landwehr Canal through a mesh of automobile, pedestrian, rapid-transit, communication, and commercial networks—even a sprig of nature Berlin
20. A struggle with water and space has defined Amsterdam from the seventeenth century through today. Canals were even filled in to create space for housing and transport—until their tourist potential proved (ispat) irresistible(dayanılmaz ) Amsterdam